Colorfastness to rubbing for workwear is an approval question about whether a colored fabric transfers color when it contacts another surface under dry or wet rubbing. Buyers should approve a defined fabric, colorway, panel, finish, care state, test method, and acceptance rule—not a vague promise that a garment is “colorfast.”
What crocking means in a workwear approval
Crocking is color transfer caused by rubbing. In a workwear program, the practical concern is usually visible transfer from a colored surface to a lighter shirt, vehicle seat, glove, lining, laundry item, or adjacent garment panel.
A rubbing result is primarily about the staining of the rubbing cloth. It is not the same question as whether the donor fabric itself has changed shade. A buyer should distinguish both observations:
- Donor fabric shade change asks whether the tested workwear surface visibly changed after the exposure.
- Staining of the rubbing cloth asks how much color transferred to the contacting material.
These observations can lead to different commercial decisions. A dark panel may still look visually intact while transferring enough color to create a complaint on a light adjacent surface. Conversely, a modest change to the donor surface may matter to a uniform program even where staining is limited. Put both review points in the approval record instead of treating one as proof of the other.
Colorfastness is a broader family of properties. A fabric can perform acceptably in one exposure and still need separate evaluation for washing, light, perspiration, or dry cleaning. In particular, a workwear rubbing result is not evidence of chemical safety, washable life, flame resistance, arc protection, high-visibility performance, PPE status, or certification.
For buyers already defining broader transfer exposures, perspiration colorfastness is a separate decision: moisture and body-contact exposure should not be folded into a rubbing approval by assumption.
Dry and wet crocking answer different use questions
Dry crocking is most relevant to ordinary friction when both surfaces are dry: a dark trouser seat against a vehicle seat, a jacket cuff against a bag strap, or a pocket edge against another garment. Wet crocking evaluates a specified wet rubbing condition. It can inform a moisture-related transfer question, but a laboratory water-wet result is not a direct simulation of every workplace liquid or perspiration exposure.
Wet and dry results should be requested and evaluated as separate fields. They are not interchangeable labels, and a dry result should never be used as a shortcut for a wet-use claim. The buyer’s job is to decide whether each condition reflects the intended garment and customer experience.
AATCC TM8 describes an assessment of color transferred from colored textiles to another surface through rubbing, with both dry and water-wet white test cloth procedures. Its public scope also notes that laundering, dry cleaning, shrinkage, ironing, and finishing can affect transfer, so testing may be set before and/or after a specified treatment. AATCC TM8
That scope matters because “as received” is not automatically the condition in which the wearer will use the garment. A fabric may be approved as received, after a defined care treatment, or in both states. The stated care route must be sufficiently specific for the program: for example, a buyer-specified home-laundering route, commercial-care route, or other agreed treatment. Do not write “after washing” without identifying what that means in the approval plan.
Start with transfer-risk mapping, not a universal grade
There is no responsible universal pass grade for all workwear. A workable acceptance rule depends on the product’s color, construction, intended contact, care state, end market, and complaint risk. A single global number can obscure the areas that actually matter.
Map the garment before choosing the testing coverage.
Map high-consequence colors and interfaces
Identify dark shades, saturated colors, contrast blocks, prints, coated or otherwise finished areas, logos, and decorative elements. Then identify their likely contact surfaces: light shirt panels, pale linings, vehicle upholstery, light gloves, seat surfaces, or customer uniforms.
For example, consider a work trouser with a dark seat panel paired with a light service shirt. The dark panel may be a higher transfer-risk area because it experiences sustained contact and sits beside a visibly light uniform component. The buyer could request dry and wet rubbing evidence for that actual panel fabric and shade, rather than allowing a result from a lighter body fabric to stand in for it. This is an approval example, not a measured result or a prediction about any product.
A logo creates a separate mapping question. Its size, position, print chemistry, and contact pathway may mean it needs its own sampling plan. A pass on the base cloth does not automatically describe a localized decoration.
Treat lots and finishes as approval variables
A report has value only if it is traceable to what will be supplied. Record the fabric identity, colorway, finish, lot or batch reference where available, garment location, and pre-care state. If the approved item changes in a way that could affect rubbing behavior—such as shade, printed artwork, finishing route, or fabric source—the buyer should decide whether refreshed evidence is needed.
This does not require testing every square inch of every garment. It requires a rational coverage statement: which risk-bearing colors, panels, and constructions are represented, and which are not.
TM8 and TM116: choose the method for the test area
The decision between AATCC TM8 and AATCC TM116 begins with the area that needs assessment, not with an assumption that their results can be compared as identical.
AATCC TM8 is the standard Crockmeter method in this comparison and is applicable to colored yarns and fabrics, including dyed, printed, or otherwise colored textiles. Its public scope says it is not recommended where a print area is too small to isolate with that method. AATCC TM8
AATCC TM116 uses a rotary vertical crockmeter and is especially intended for prints where smaller areas must be singled out than is possible with the standard TM8 crockmeter. Its scope includes dry and wet procedures and assessment of transferred color on test squares. AATCC TM116
For buyer approval, the useful comparison is straightforward:
- Use TM8 when the relevant colored area can be represented by its intended standard-crockmeter application.
- Consider TM116 when the approval question is a small print or other restricted colored region that needs localized assessment.
- Do not treat TM8 and TM116 results as automatically equivalent or transferable. Record the method, edition, condition, and evaluated location alongside every reported rating.
The public summaries explain purpose and assessment at a high level, not a complete laboratory protocol. Buyers should therefore specify the standard edition and ask the testing party to perform and report the agreed method rather than trying to recreate a protocol from a web summary.
A numbered workflow for dry and wet crocking approval
- Write the use scenario. Define what transfer would matter: contact with light apparel, seating, gloves, linings, adjacent panels, or another named surface. State whether the scenario can be dry, wet, or both.
- Create a color-and-panel map. List every dark, saturated, contrast, printed, or finished area that could create a material complaint risk. Include logos and trim where relevant.
- Set the approval state. Choose as-received, a buyer-specified pre-care state, or both. Name the care route in the specification so that later reports are comparable.
- Select coverage by colorway. Decide which actual shades, finishes, panels, and lots the evidence covers. A generic fabric-family statement is not a substitute for a colorway-based coverage statement.
- Choose the method for the area. Identify TM8 or TM116 as appropriate to the test region, including a specific decision for small prints. Reference the required edition in the request.
- Agree the acceptance rule before testing. Define how dry and wet results will be judged, whether donor shade change will also be reviewed, and which program stakeholder can grant a deviation. Avoid inserting a pass criterion after a report arrives.
- Request a complete report package. Ask for method and edition, dry or wet condition, sample identification, colorway, test location, pre-care state, reported rating, evaluation approach, report date, and laboratory identity. Include photos only if they are useful for locating panels; they are not a replacement for the report fields.
- Make a disposition that matches the evidence. Approve the defined configuration, request corrective development, approve with a stated restriction, or hold the item. If a revised fabric or finish is offered, link the next decision to the revised sample rather than to the earlier result.
- Preserve the approval record for reorders. Keep the approved swatch, sample reference, colorway coverage, care-state definition, and report with the product specification. This reduces ambiguity when a program adds colors or repeats production.
Compact approval checklist
Before release, confirm the following in one concise approval record:
- Product style, fabric reference, colorway, panel location, and finish are identified.
- Dry and wet conditions are individually requested where each is relevant.
- The state is clearly marked as as-received, specified pre-care, or both.
- TM8 or TM116 and the edition are named; a small-print decision is explicit.
- The required rating or other acceptance rule was set before review.
- The report identifies the tested sample and condition, not only the fabric family.
- Any donor shade-change review is recorded separately from rubbing-cloth staining.
- The evidence coverage and any exclusions for other lots, shades, decorations, or finishes are visible.
- Other claims, including FR, arc, high-visibility, chemical, and PPE claims, remain on their own evidence tracks.
Common approval mistakes
The first is approving “black fabric” rather than a named black fabric, finish, and garment application. Dark colors can be visually similar while representing different constructions or finishing routes.
The second is approving only a body fabric when the practical risk lies in a contrast panel, print, transfer, or trim. Test planning should follow exposure and appearance risk, not simply garment area.
The third is accepting a report without knowing whether it represents an unwashed sample or an agreed post-care state. This makes later comparison difficult and can turn a technically correct report into the wrong commercial evidence.
The fourth is treating a product photo as test proof. Photography can illustrate where a panel or decoration sits. It cannot establish that a specific SKU, lot, or colorway passed a rubbing assessment.
The fifth is extending a crocking result into a broad durability claim. The right response is to build a compact evidence matrix in the tech pack, with each requirement matched to a condition and record type.
Buyer FAQ
What does crocking mean in textiles?
Crocking is transfer of color from a colored textile surface to another surface through rubbing. For workwear, approval should focus on the relevant colored area, contact scenario, dry or wet condition, and defined sample state.
How do you know whether workwear fabric is colorfast?
First define the exposure. A rubbing result addresses transfer under rubbing, while washing, light, and perspiration are different exposures. For crocking, request traceable dry and wet evidence for the specified fabric, colorway, finish, panel, and care state.
What is the difference between colorfast and non-colorfast?
In practical buyer terms, a colorfast material resists an agreed kind of color change or transfer under an agreed exposure. “Non-colorfast” is incomplete unless it states the exposure, condition, method, and observed issue.
Is a wet crocking result more important than a dry result?
Neither is inherently more important. Dry results are relevant to dry contact; wet results are relevant when moisture is plausible. The priority comes from the garment’s use scenario and its adjacent surfaces.
Can a base-fabric result approve a small printed logo?
Not automatically. Identify the actual printed region and ask whether it can be isolated by the selected method. TM116 addresses smaller print areas than TM8; document the method and location instead of treating the ratings as interchangeable.
Put the decision into the workwear specification
Veelianpro supports custom workwear and uniform development; see OEM Workwear Manufacturing for the broader development context. To align a colorway-and-panel approval plan with your tech pack, discuss your project.
