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Two knitted fabrics can have similar colors, weights, and handfeel yet behave very differently during finishing, cutting, and garment production. One important reason is the form in which the fabric is processed. Some knitted fabrics remain in a continuous tube, while others are slit and opened into a flat sheet. This decision affects how manufacturers measure width, inspect defects, control tension, and prepare fabric for cutting. However, choosing between open width and tubular fabric is not simply a matter of deciding which method is more advanced. The better option depends on the fabric construction, fiber composition, finishing requirements, garment design, and measurable performance after washing.
Open-width fabric is knitted material presented as a flat sheet, often after a tubular fabric is slit along a controlled line. Tubular fabric remains a continuous knitted loop and is commonly measured by its circumference or folded width. Open width can simplify full-surface inspection and width control, while tubular processing avoids a slit edge. The appropriate form depends on finishing requirements, garment construction, usable width, and verified fabric performance.
For apparel manufacturers, the real decision begins with the finished garment rather than the fabric roll. A material that looks satisfactory during sampling may still create problems if its usable width is insufficient, its edges curl during spreading, or its dimensions change after laundering. These issues can affect cutting yield, garment measurements, seam alignment, and the consistency of repeat orders. At Modaknits, fabric development decisions need to connect material selection with finishing, garment construction, and quality verification. Understanding the differences between open-width and tubular processing helps manufacturers identify the right route before committing to bulk production, when changing the process may become more expensive and disruptive.
What Is Open-Width vs Tubular Fabric?
Open-width and tubular fabric describe two different physical forms in which knitted fabric is handled during manufacturing. Tubular fabric remains a continuous knitted loop, while open-width fabric is presented as a flat sheet, often after a controlled longitudinal slitting operation. The choice affects finishing, width measurement, surface inspection, and cutting preparation, but neither form automatically guarantees better quality or dimensional stability.
How Is Tubular Knit Fabric Formed?
Tubular knit fabric is commonly produced on a circular knitting machine, where needles arranged around a cylinder form interlocking loops of yarn into a continuous tube. Depending on the machine configuration and yarn arrangement, the resulting material may be single jersey, rib, interlock, or another circular-knit construction. Because the fabric forms a continuous circumference, its nominal laid-flat width is approximately half its circumference when the tube is folded evenly without stretching. This geometric relationship provides a useful starting point for material planning, but the actual finished width depends on relaxation, finishing, and measurement conditions.
For example, a tubular fabric measuring 80 cm across when laid flat has an approximate circumference of 160 cm. That does not mean it will provide 80 cm of usable width after every finishing operation. Fabric tension, residual shrinkage, edge behavior, and the way the tube is measured can change the result. Tubular construction can be useful for garment components designed around a continuous loop, but the machine diameter and fabric properties place practical limits on the available dimensions. A supplier should therefore distinguish nominal dimensions from finished, usable dimensions.
For everyday knitwear, the important question is whether the tube can supply the dimensions and performance required by the finished garment. A supplier should be able to identify the knit structure, nominal width, finishing condition, and relevant dimensional results rather than describing the material only as tubular cotton jersey. This distinction becomes particularly important when comparing suppliers, because two fabrics with similar nominal widths may offer different usable dimensions after finishing and relaxation.
How Is Tubular Fabric Opened into Open Width?
Tubular fabric can be converted into open width by cutting along a controlled longitudinal line and spreading the resulting material into a flat sheet. In many circular-knit finishing operations, this process is called slitting. Before the tube enters the opening equipment, the mill may need to identify the intended cutting line, control fabric rotation, and ensure that the material feeds consistently. Spreading equipment then opens the tube and guides the fabric toward subsequent finishing, inspection, or cutting operations.
The operation changes the fabric’s handling characteristics without changing its original knitting method. A circular-knit single jersey remains single jersey after it has been slit open. However, the operation introduces two exposed longitudinal edges, and those edges may curl, stretch, or become irregular if the fabric structure, cutting position, blade condition, or tension is poorly controlled. Excessive tension during spreading can also distort the material, particularly when wet fabric is processed through several guide points.
Not every open-width fabric necessarily begins as a tubular roll. Some materials may be produced or supplied in an open form, depending on the knitting equipment and construction. The production route should therefore be confirmed rather than assumed from the finished roll’s appearance. When tubular fabric is opened, the mill should inspect the cut edges, usable width, surface appearance, and alignment before approving the material for downstream processing. CottonWorks explains the relationship between tubular and open-width fabric in its Open Width textile glossary.
Are Open Width and Flat Knitting the Same?
Open width and flat knitting describe different aspects of textile production. Open width refers to the physical form in which fabric is presented or processed, while flat knitting refers to a knitting method that uses a flat needle bed to form fabric panels or shaped components. Circular-knit fabric does not become flat-knitted fabric simply because it has been slit open. Its original loop structure, yarn arrangement, and construction remain fundamentally unchanged.
This distinction matters when a manufacturer discusses production capability with a customer. A supplier offering open-width circular knits may be able to supply single jersey, rib, or interlock in a flat form, but this does not establish that the supplier produces flat-knitted components. The two processes can have different construction capabilities, equipment requirements, and garment applications. Confusing these terms can lead to incorrect specifications or assumptions about the material’s construction.
A precise specification should identify both the fabric construction and its processing form. For example, a request for 100% cotton single jersey in open width describes a fiber composition, a knit structure, and a handling form. It still needs a defined GSM, finished width, color, finishing condition, and relevant performance requirements. For Modaknits, this distinction helps connect the customer’s garment requirements with the actual fabric being developed, preventing a processing term from being mistaken for a complete material specification.
How Do Open-Width and Tubular Finishing Differ?
Tubular finishing processes knitted fabric while it remains in a continuous tube, whereas open-width finishing handles the material as a flat sheet. Tubular routes can avoid a slit edge and may suit tube-based equipment, while open-width routes can simplify full-surface inspection and width control on suitable machines. The correct choice depends on fabric construction, fiber content, finishing requirements, equipment, and the intended garment.
Which Finishing Steps Change After Slitting?
The principal difference is how the fabric enters and moves through the finishing line. Tubular processing can include washing, dewatering, drying, and compacting while the fabric remains in a continuous loop. Equipment must accommodate the tube’s dimensions and manage tension without creating persistent folds or unwanted stretching. Open-width processing generally requires the material to be spread flat before it enters equipment designed to handle a single fabric sheet. Depending on the material, the route may include washing, drying, stentering, compacting, inspection, or additional finishing operations.
Slitting can make some downstream operations easier because the fabric is visible across its width and can be guided more directly. However, opening also introduces extra handling and potential sources of variation. An incorrectly positioned cutting line, uneven spreading, or excessive tension may create edge distortion that was not present in the original tube. These risks need to be considered alongside the benefits of flat processing. The fabric may also require additional edge handling or trimming before cutting.
The additional operation is not necessarily an unnecessary cost. If open-width processing reduces handling problems later, improves inspection, or supports a required finishing treatment, the overall route may still be more efficient. Conversely, converting a suitable tubular fabric into open width without a clear technical reason can add processing time and edge losses. The relevant comparison is the complete route from unfinished material to approved finished fabric, including usable yield, quality, and production requirements. CottonWorks’ technical guidance on wet processing of cotton knitted fabrics discusses slitting, spreading, and the importance of controlling tension during these operations.
How Do Stentering and Compacting Affect Fabric?
Stentering and compacting serve different purposes, although both can influence the final dimensions and behavior of knitted fabric. A stenter transports suitable fabric across its width while applying controlled processing conditions. Depending on the material and treatment, it can help establish the finished width, manage fabric tension, and heat-set certain constructions, including appropriate thermoplastic or elastane-containing blends. Open-width fabric is commonly suited to this type of flat processing because the material can be guided across its full width.
Compacting is a mechanical finishing process used to relax knitted fabric and reduce residual shrinkage. Equipment may be designed for tubular or open-width material, depending on the manufacturing route. The result depends on the construction, fiber content, moisture conditions, feed tension, overfeed, and machine settings. Simply passing fabric through a compactor does not establish that it will meet a specified shrinkage target. Different cotton, polyester, and elastane blends may require different settings and validation procedures.
For example, a fabric may measure correctly immediately after finishing but contract significantly during washing if relaxation and compaction were inadequate. Excessive tension during finishing may also leave the material temporarily stretched, producing misleading measurements before laundering. A sound approval process therefore checks the finished fabric under defined conditions and measures dimensional changes after washing. The objective is to confirm that the process produces stable dimensions, not merely that the fabric leaves the machine at the requested width.
Can Both Routes Handle Every Knit Structure?
Both tubular and open-width routes can handle many knitted constructions, but the available machinery and process settings determine what is practical. Single jersey, rib, and interlock can be processed in different forms depending on the mill’s equipment, yarn characteristics, fiber blend, and intended application. Stretch-rich fabrics may require particular attention to tension and heat-setting, while fabrics intended for specific printing or coating treatments may require a flat presentation for the next operation.
Even two fabrics with the same nominal construction can behave differently during finishing. A cotton single jersey and an elastane-containing single jersey may respond differently to heat, relaxation, and mechanical tension. Similarly, a rib structure can contract substantially across its width when relaxed, so a measurement taken under tension may not represent its final usable dimensions. The route must accommodate the material’s actual behavior rather than relying on a generic process for every knit.
Before bulk production, the manufacturer should verify that the proposed finishing route can achieve the approved width, appearance, handfeel, and dimensional stability. A representative sample should be measured and washed under the intended care conditions. If a supplier changes the opening method, finishing equipment, or process settings after sample approval, the effect on relevant properties should be assessed. This approach allows fabric development decisions to be based on repeatable results rather than assumptions about what a particular machine can achieve.
How Do Width, Shrinkage, and Spirality Compare?
Open-width processing makes flat width measurement and full-surface inspection more straightforward, while tubular fabric requires careful distinction between circumference and laid-flat width. Neither form eliminates shrinkage or spirality. Reliable comparison requires consistent measurement conditions, defined acceptance limits, and post-wash verification because knit structure, yarn characteristics, finishing tension, and relaxation all influence the final result.
How Should Total and Usable Width Be Measured?
Total width and usable width are not necessarily the same. Total width describes the full measured dimension of the fabric, whereas usable width excludes areas that cannot be used reliably for the intended product, such as damaged edges, unacceptable slit marks, or portions that must be removed during spreading and cutting. A roll can meet its nominal width specification while providing less material for pattern placement than the cutting room requires.
For tubular fabric, the supplier should state whether the quoted dimension refers to circumference or width measured across the folded tube. For open-width fabric, the specification should distinguish total finished width from usable finished width. Measurements should be taken with the material in a defined, relaxed condition and without pulling the fabric to reach a target dimension. Where the material is elastic or highly responsive to tension, measurement conditions become especially important.
An illustrative example shows the difference. If a tubular fabric measures 80 cm across when laid flat, its approximate circumference is 160 cm. If the corresponding open-width material measures 158 cm overall, the usable width may be lower if the edges are curled or require trimming. The actual usable dimension must be measured rather than inferred from the nominal width. For garment development, that figure should be compared with the cutting marker and pattern layout before the fabric is approved for bulk production.
| Measurement | Illustrative value | Practical meaning |
| Tubular fabric laid-flat width | 80 cm | Width measured across a folded tube without stretching |
| Approximate tubular circumference | 160 cm | Roughly twice the laid-flat width |
| Open-width total width | 158 cm | Full measured width after opening and finishing |
| Open-width usable width | 155 cm | Example only, after excluding unusable edge areas |
| Difference between total and usable width | 3 cm | Material excluded from the cutting width in this example |
These values illustrate the measurement relationship; they are not Modaknits production specifications or universal textile tolerances. The actual width must be established from the finished fabric and agreed measurement procedure.
Does Open-Width Processing Improve Width Control?
Open-width processing can improve access to the full fabric surface, making it easier to inspect width variation and guide the material through suitable finishing equipment. A stenter, for example, can hold the fabric at a controlled width during processing. This is valuable when garment panels require consistent dimensions, when printed artwork must align with a pattern, or when cutting efficiency depends on a predictable usable width.
However, easier access does not automatically guarantee better dimensional accuracy. If the fabric is stretched excessively during spreading or finishing, it may appear wider than it will be after relaxation. Uneven edge control can produce width differences across the roll, while poorly controlled slitting may introduce distortion. Tubular finishing can also produce consistent results when the equipment and process are appropriate for the material.
The meaningful comparison is the variation observed across several measurement points and, where necessary, across multiple rolls or lots. A supplier should define the target width, tolerance, measurement condition, and treatment of unusable edges. For visually sensitive products, inspection should also cover alignment, surface appearance, and whether the fabric remains stable after washing. Open width can make these controls easier to implement, but the result still depends on the process and the evidence collected. A measured and repeatable result is more useful than assuming that one form is inherently more accurate.
How Are Shrinkage and Spirality Verified?
Shrinkage measures the change in fabric dimensions after a defined treatment, commonly washing and drying. Spirality describes rotational distortion in knitted fabric or garments, often observed when side seams or fabric features rotate away from their intended alignment after laundering. Although both can be influenced by knit structure, yarn torque, finishing, and relaxation, they are separate characteristics and should be assessed independently.
Shrinkage can be calculated by comparing the original measurement with the measurement after washing. If a 100 cm reference length becomes 97 cm, the lengthwise shrinkage is 3%. The same calculation can be applied to width, but the two directions should be recorded separately. AATCC TM135 is a reference method for evaluating dimensional changes in fabrics after home laundering. AATCC TM179 is relevant to skew change in fabrics, while garment-level evaluation may require additional measurements appropriate to the product.
The test protocol should identify the sample, washing conditions, drying method, number of cycles, measurement points, and acceptance criteria. A single result is less informative if its conditions are not recorded or if the sample cannot be traced to the production lot. Repeated measurements after one and five washes can help reveal whether dimensional changes are stable or continue to accumulate. The correct acceptance limits depend on the product and agreed specification; a test method alone does not establish that a fabric has passed.
The following figures are Modaknits internal reference targets for relevant products, not universal industry limits. Customer-specific requirements take precedence.
| Parameter | Modaknits internal reference target | Interpretation |
| First-wash shrinkage | Length and width each ≤3% | Evaluate under documented wash conditions |
| Cumulative shrinkage after five washes | Length and width each ≤5% | Assess repeated-wash dimensional stability |
| First-wash spirality | ≤3% | Apply the defined measurement method |
| Base fabric weight for the core blank | Approximately 230 GSM | Record the base-fabric state |
| Finished core blank reference | Approximately 260 GSM after washing and preshrinking | Do not confuse this project-specific reference with base-fabric GSM |
The GSM values above describe different production states in Modaknits’ internal framework and should not be treated as directly comparable measurements without confirming the measurement basis. All test results should be interpreted against the relevant product specification and documented test conditions.
Which Fabric Form Fits Different Knitwear Applications?
The appropriate fabric form depends on garment construction, finishing requirements, usable width, and verified performance. Tubular fabric may suit components that benefit from a continuous loop or reduced seam requirements, while open width is often practical for conventional cut-and-sew production, flat inspection, and controlled pattern placement. Neither form is universally better; the choice should reflect the intended product and the capabilities of the selected manufacturing route.
When Is Tubular Processing a Practical Choice?
Tubular processing can be practical when a garment or component can make good use of the fabric’s continuous-loop construction. Certain tubular components, underwear applications, cuffs, and selected garment bodies may benefit from reduced seam requirements or from being formed around the dimensions available from a circular knitting machine. Retaining the tube also avoids introducing a longitudinal slit edge before finishing, which can be useful when the fabric and equipment are suited to tubular processing.
The main limitation is that the tube’s dimensions must match the product’s construction requirements. A machine’s available diameter constrains the circumference that can be produced, while relaxation and finishing influence the final width. A tube that is suitable for one garment size or pattern may not provide the dimensions required for another. In addition, fold creases, surface visibility, and dimensional stability must be considered throughout finishing and storage.
Tubular fabric should therefore be evaluated as part of the complete garment process. The team needs to know whether the material will be used as a tube, opened before cutting, or converted into panels at a later stage. If the intended product requires large flat panels, extensive placement printing, or precise matching across garment pieces, the benefits of retaining the tube may be limited. The best choice is the route that supports the approved construction and delivers repeatable dimensions without creating avoidable downstream work.
When Is Open-Width Processing Preferable?
Open-width processing is often preferable when the fabric must be spread flat for finishing, inspection, printing, or conventional cut-and-sew production. A flat sheet makes it easier to inspect the full surface and measure the available width. It can also simplify pattern placement, stripe alignment, and the planning of cutting markers. For garments with several panels, the ability to inspect the material across its width helps the production team identify defects before they are spread through multiple garment pieces.
The benefits depend on the condition of the finished fabric. A nominal width is not sufficient if the edges curl, the slit line is damaged, or the material contracts after washing. The usable width should be established after the relevant finishing process and compared with the actual cutting layout. For products with printed artwork or visually matched panels, the team should confirm that opening and finishing have not introduced unacceptable distortion.
Open width can also involve additional handling and finishing costs, so it should not be assumed to be the cheaper route. The comparison should consider the entire manufacturing sequence, including conversion, inspection, edge losses, fabric yield, and any extra treatment required. A representative finished sample and cutting trial can reveal whether the additional process creates enough practical value. The objective is to select the form that meets the garment’s dimensional and visual requirements while keeping the production route manageable and repeatable.
What Matters for T-Shirts, Rib, and Stretch Knits?
T-shirts, rib fabrics, and stretch knits have different performance requirements, so their processing forms should be evaluated separately. A cotton single jersey used for a relaxed T-shirt may require particular attention to GSM, handfeel, usable width, shrinkage, and spirality. Rib fabric used for neckbands or cuffs must also provide suitable stretch and recovery, while elastane-containing fabrics may need controlled tension and appropriate heat-setting to maintain their intended behavior.
For a T-shirt body, the team should confirm that the fabric width supports the pattern and that the finished garment retains the approved chest, length, and shoulder measurements after washing. For rib components, dimensional compatibility between the rib and the main body is important because differential shrinkage can affect neckline appearance and garment fit. Stretch fabrics require additional consideration of how measurements change when the material is relaxed or under tension.
Printing and decoration can introduce further constraints. Placement artwork must remain aligned with the intended garment panels, and the fabric’s surface and finishing condition must be suitable for the selected printing method. Before bulk production, the team should compare the approved fabric and a representative garment after washing. This provides a more reliable basis for choosing between tubular and open-width processing than a general rule based on garment category alone. The decision should follow the actual construction, performance targets, and finishing capabilities.
What Quality Risks Should Be Checked Before Bulk Production?
Before bulk production, the main risks to check include fold creases, edge curl, slitting damage, width variation, residual shrinkage, spirality, surface defects, and differences between approved samples and bulk fabric. Open width can make certain defects easier to inspect, but slitting introduces additional risks. Tubular fabric avoids a slit edge but still requires controls for folds, width, and dimensional behavior. Inspection should therefore follow the material’s actual risks and product requirements.
Are Fold Creases, Edge Curl, and Slit Marks Present?
Fold creases can develop when tubular fabric remains folded during storage or processing, particularly if the finishing route does not adequately control the folds. After dyeing or finishing, the affected areas may show visible lines or shade differences that are difficult to remove without additional treatment. Edge curl is a different problem that occurs naturally in some knitted structures, especially single jersey. It can interfere with spreading, measurement, and cutting, even when the central fabric surface appears acceptable.
Slit marks and edge damage require specific attention when tubular fabric is converted into open width. A poorly aligned cutting line, unsuitable blade condition, or excessive tension during opening may produce irregular edges or distortion. The material should be inspected along the full usable width, and the cut edges should be examined before the fabric enters subsequent operations. If edge trimming is necessary, the resulting usable width must still satisfy the garment’s requirements.
The inspection record should identify the defect, location, severity, and disposition. Photographs can support comparison when the same issue appears in later lots, but the record should also include the roll or batch identity. When a defect repeats, the supplier should investigate its likely causes rather than relying solely on sorting. This may involve checking storage conditions, cutting alignment, fabric tension, finishing settings, or material construction. Corrective action is most useful when it changes the process that created the problem and verifies that the revised process produces an acceptable result.
How Should GSM, Colorfastness, and Surface Quality Be Checked?
GSM, colorfastness, pilling, surface appearance, and dimensional stability provide different information about fabric quality. GSM measures mass per unit area; it does not independently establish thickness, softness, durability, or suitability for a garment. Colorfastness indicates how well color resists specified treatments, while pilling assessment evaluates surface changes under defined test conditions. A fabric can meet its weight target yet still exhibit excessive shrinkage, poor rubbing performance, uneven shade, or an unacceptable surface after washing.
Measurements should be taken under controlled conditions, using representative samples from the relevant lot. Fabric weight should be checked at multiple positions rather than relying on a single small piece, and the measurement should identify whether the material is in a base or finished state. Color assessment should account for shade variation across rolls and within a lot, while surface inspection should consider barre, streaks, fuzzing, and other visible defects. When the material is intended for dark-colored garments, rubbing and laundering performance may deserve particular attention.
Reference methods can support repeatable assessment. ASTM D3776/D3776M is relevant to fabric mass per unit area, AATCC TM135 to dimensional changes after home laundering, and ASTM D4970/D4970M to pilling resistance under the specified method. The selected test conditions and acceptance limits should be agreed before testing. Modaknits’ internal targets are intended to guide product development and batch comparison; they are not a substitute for customer requirements or batch-specific third-party reports. A test-method reference should never be presented as proof that a particular lot has passed.
What Records Connect Sample Results to Bulk Production?
A sample approval is only useful if the bulk fabric can be compared with the same requirements. The approval record should identify the fabric construction, composition, color, weight, width, finishing condition, and relevant test results. It should also record the approved sample version and any changes made before production. Without this information, two lots may be treated as equivalent even when their finishing routes or dimensional performance differ.
A practical control sequence links specification, process checks, testing, records, evidence, and corrective action. Each fabric lot should have a traceable identity connecting the supplier, roll number, color, GSM, width, inspection results, and relevant test records. Where a deviation occurs, the record should show what was affected, how the problem was investigated, what corrective action was taken, and whether the revised material passed the required checks. Retained samples can also provide a useful reference when investigating complaints or evaluating repeat orders.
For bulk approval, inspection frequency should reflect the risk and agreed requirements. Critical defects may require a zero-acceptance rule, while other defects can be managed under a defined sampling plan. AQL values should not be applied without clarifying the inspection standard, lot size, defect classification, and customer requirements. The objective is to ensure that acceptance decisions are consistent and traceable rather than based on a general statement that the factory follows strict quality control. A sample-to-bulk comparison should verify the actual properties that matter to the finished garment.
How Should Open-Width or Tubular Fabric Be Specified and Approved?
A fabric specification should identify the knit structure, composition, processing form, finished width, GSM, finishing requirements, and relevant performance criteria. Approval should be based on a representative sample, documented measurements, and appropriate test results. Before bulk production, the supplier and customer should agree on measurement conditions, acceptance limits, and change-control requirements so that the approved standard can be reproduced consistently.
What Should a Fabric Specification Include?
A useful fabric specification removes ambiguity from the quotation and production process. Describing a material only as cotton jersey with a particular GSM and open-width form leaves important questions unresolved, including the width measurement basis, finishing condition, permitted tolerance, and performance after washing. The specification should define the material clearly enough for different teams to assess the same requirements without relying on assumptions.
The following information is useful where relevant:
- Construction: Knit type, stitch structure, and any special construction requirements.
- Composition: Fiber percentages, including elastane or other blended fibers.
- Weight: Target GSM, tolerance, and whether the figure refers to base fabric or finished material.
- Processing form: Tubular or open width, including how the width is measured.
- Width: Target finished width, usable width, tolerance, and any edge exclusions.
- Finishing: Washing, compacting, heat-setting, dyeing, or other required treatments.
- Performance: Shrinkage, spirality, pilling, colorfastness, and other relevant tests.
- Approval basis: Sample reference, test conditions, acceptance limits, and change-control requirements.
These fields help the manufacturer compare supplier offers on a consistent basis. They also clarify whether a quoted width can support the actual cutting marker. Where a project requires a specific usable width, that requirement should be written explicitly rather than inferred from the overall roll measurement. The more clearly the fabric is defined, the easier it becomes to evaluate substitutions and prevent unapproved changes before bulk production.
Which Samples and Test Results Should Be Approved?
Approval should begin with a sample that represents the intended construction and finishing route. The development team should confirm composition, weight, width, color, handfeel, and surface appearance. For everyday knitwear, dimensional changes after washing are particularly important because the material must continue to support the approved garment measurements after laundering. Where spirality, pilling, or color transfer presents a meaningful risk, the relevant tests should be completed before the bulk order is released.
Visual approval and technical approval should be treated as separate checks. A fabric may look correct but fail a dimensional requirement, while an acceptable test result does not necessarily confirm that the shade or handfeel matches the approved sample. Both types of evidence are needed. The record should identify the sample, lot where applicable, measurement conditions, test methods, results, and decision against the agreed specification.
The team should also establish what happens when the material or finishing route changes. A different dye lot, finishing setting, fiber blend, or opening method may affect the properties that were originally approved. The necessary checks should be repeated according to the risk and specification rather than assuming that the original sample remains representative. A retained approval sample provides a useful reference for bulk inspection and repeat orders. It helps the supplier and customer compare actual material against an agreed standard instead of relying on memory, photographs, or informal descriptions.
How Can Suppliers Demonstrate Process Control?
A capable supplier should be able to explain how a fabric specification is translated into manufacturing controls and how deviations are detected and resolved. Useful evidence includes material records, width and GSM measurements, relevant test results, sample approvals, inspection records, and corrective-action documentation. The evidence should identify what was checked, under which conditions, and against which requirement. Generic factory photographs or broad claims about quality cannot replace product-level records.
For Modaknits, the manufacturing approach connects garment development and production in Humen, Dongguan, with documented quality checks and traceability. Selected specialist processes are managed through qualified partners where required, so the manufacturing boundary should be explained accurately. For a project involving cotton T-shirts or other everyday knitwear, the fabric decision can be evaluated alongside finished width, shrinkage, spirality, garment measurements, and post-wash appearance. This helps the development team judge whether the proposed material and processing route can meet the actual product requirements.
When a project needs a new fabric, a revised finishing route, or tighter dimensional limits, the specification and approval plan should be agreed before bulk production. If the material fails a requirement, the supplier should document the issue, contain the affected lot, investigate the cause, and verify the corrective action. That process makes future orders easier to compare and reduces the risk of repeating the same problem. The objective is not to claim that every fabric will behave identically, but to demonstrate that differences can be measured, investigated, and controlled against an agreed standard.
Conclusion
The choice between open-width and tubular fabric ultimately depends on how the material must be finished, measured, inspected, and converted into a garment. Tubular processing can suit constructions that benefit from a continuous loop and avoids a slit edge, while open-width processing can make flat inspection and width control easier on suitable equipment. Neither form removes the need for careful finishing and testing. The most reliable decision is the one supported by a clear specification, a representative approved sample, measurable performance criteria, and records that connect the sample to bulk production.
At Modaknits, fabric selection should be considered alongside the complete garment-development process, including material specifications, finishing requirements, fit, washing performance, and quality verification. A fabric that looks right during initial sampling is only a good choice if it also meets the agreed requirements during production and after use. By comparing usable width, dimensional stability, surface quality, and processing needs before bulk approval, apparel teams can reduce avoidable waste, improve production consistency, and make more informed decisions about their knitwear programs.
Frequently Asked Questions
1. What is the main difference between open-width and tubular fabric?
The main difference is the form in which the knitted material is handled. Tubular fabric remains a continuous loop, commonly produced on a circular knitting machine, while open-width fabric is presented as a flat sheet, often after the tube has been slit along a controlled line. This affects finishing equipment, width measurement, edge condition, inspection, and cutting preparation. It does not automatically determine the fiber composition, knit structure, quality level, or suitability for a particular garment.
2. Is open-width fabric better than tubular fabric?
Neither form is universally better. Open-width fabric can simplify full-surface inspection and support width control on suitable finishing equipment, while tubular fabric avoids a slit edge and may suit products or processes designed around a continuous tube. The appropriate choice depends on fabric construction, finishing requirements, usable width, garment design, and production equipment. A meaningful comparison should use representative finished samples and measurable results rather than assuming that one processing form always produces better quality or lower cost.
3. Does open-width processing reduce fabric shrinkage?
Open-width processing does not automatically reduce shrinkage. Dimensional stability depends on the fiber composition, knit structure, yarn characteristics, relaxation, finishing settings, and subsequent washing conditions. Stentering or compacting may help control fabric dimensions when the process is appropriate, but the result must be verified through testing. AATCC TM135 provides a reference method for measuring dimensional changes in fabrics after home laundering. Acceptance limits should be agreed in advance and evaluated using consistent washing, drying, and measurement conditions.
4. How is tubular fabric width calculated?
When a tubular fabric is folded evenly and measured across its width without stretching, its approximate circumference is twice the laid-flat width. For example, an 80 cm laid-flat width corresponds to an approximate circumference of 160 cm. This is a geometric relationship, not a guarantee of finished or usable width. Relaxation, finishing, folding accuracy, and measurement tension can influence the actual result. For purchasing and cutting, suppliers should specify the measurement basis and confirm the finished usable width under agreed conditions.
5. Which fabric form is more suitable for T-shirts?
Both tubular and open-width knitted fabrics can be suitable for T-shirts, depending on the construction and production route. Tubular fabric may be useful when the garment design can take advantage of continuous-loop construction, while open width often suits conventional cut-and-sew production that requires flat fabric spreading and pattern placement. The decision should account for usable width, GSM, shrinkage, spirality, surface appearance, and the garment’s intended fit. Testing a representative sample after washing provides a more reliable basis for selection than choosing by garment category alone.
6. What should be checked before approving open-width or tubular fabric for bulk production?
Before approval, confirm the knit structure, fiber composition, GSM, finished and usable width, color, finishing condition, and relevant performance requirements. Depending on the product, testing may include shrinkage, spirality, pilling, colorfastness, and surface inspection. The approved sample and test records should identify the material and the conditions under which it was evaluated. Any changes to the fabric source, finishing route, or specification should trigger an appropriate review before bulk release. This process helps connect the development sample with the fabric actually used in production.
