BSTAR / Underwear Lab
Test the details.
Record the decision.
A practical testing and product-review hub for underwear and knitted apparel. Connect material, fit, finishing and durability questions to sample-specific methods, observations and approvals.
Testing scope, method, sample condition and acceptance criteria are confirmed for each project. Published records identify their limits and do not create a universal product guarantee.
01 / From question to evidence
A useful test starts
before the equipment.
Define the product decision first. Then agree the sample, method, conditions and acceptance basis so the result can guide development or production.
State the question
Identify the material, construction or durability decision the test needs to support.
Record the sample
Note the product version, material specification, size, quantity and starting condition.
Follow the method
Record the test conditions, measurements, photographs and any deviation from the plan.
Connect the result
Explain what the evidence changes in sourcing, sampling, production or inspection.
BSTAR may record project-specific observations and checks. Regulatory, certification or buyer-required reports must identify the applicable method, laboratory, certificate holder, scope and validity.
02 / Test library
Ten questions behind
a better product brief.
Each area below is a testing topic and record framework. Results are published only when the sample, method, evidence and limitations are available.
Modal vs Cotton
Compare identified fabric specifications under equivalent conditions rather than assuming one fiber is always better.
Record: composition · GSM · finish · test basisGSM & Weight
Check actual fabric weight and sample variation against the agreed material specification.
Record: specimen area · conditioning · readingsWaistband Stretch Recovery
Learn how to define the specimen, load or extension, recovery interval, laundering conditions and approval criteria before production.
Read the full waistband test guideWash Test
Define wash and drying conditions, record changes in fit, color, elastic and construction, and agree review decisions before bulk production.
Read the full wash test checklistPilling Resistance
Learn how to define the test method, specimen condition, exposure and acceptance basis before approving underwear fabric.
Read the full pilling test guideShrinkage
Mark measurement points and calculate dimensional change after the agreed treatment.
Record: points · method · calculation · resultColorfastness
Name the exposure being assessed and the applicable grading or buyer requirement.
Record: laundering · rubbing · perspiration as requiredPrint Durability
Observe cracking, peeling, colour or adhesion change after the agreed exposure.
Record: print system · cure · cycles · photosHeat Transfer
Review placement, edge adhesion, surface change and wash response for the selected transfer.
Record: material · application · care routePouch Construction
Connect pattern and seam decisions to measurements, fit comments and sample revisions.
Record: version · change · fit evidence · approval03 / Material comparison
Modal or cotton?
Define “better” first.
A meaningful comparison uses identified fabrics and the same evaluation conditions. Fiber names alone do not establish handfeel, weight, stretch, recovery, wash response or suitability for a specific underwear style.
Review fabric decisions in the Manufacturing GuideNo universal winner is assumed. The conclusion belongs to the tested samples and the intended product.
04 / Stretch, wash and dimensional change
Use the same reference.
Measure the change.
Waistband recovery, wash response and shrinkage become useful only when the starting measurement, treatment and final measurement follow the same agreed method.
- Identify the sample and orientation
- Mark the measurement points
- State the wash and drying route
- Record cycle count and conditions
- Photograph the same areas
- Link the result to the next decision
05 / A record another person can review
Keep the result
with its context.
Every published Lab record should allow a buyer, product developer or production team to identify exactly what was tested and what the result can support.
- Decision question
- What product decision should this test support?
- Sample identity
- Product, version, material specification, size, quantity and sample ID.
- Method & conditions
- Procedure, equipment or tools, conditioning, exposure and any deviation.
- Evidence
- Raw measurements, calculations, dated photographs and observations.
- Result
- What happened for the tested sample, without expanding the claim beyond the evidence.
- Manufacturing implication
- What changes, stays, needs confirmation or requires another test.
- Limits & approval
- Applicable scope, uncertainty, open items, reviewer and approval date.
06 / Evidence levels
Name the type
of evidence.
Different questions require different levels of control. The published record should state which level produced the result.
Product observation
A documented visual, tactile or fit observation for an identified sample. Useful for development discussion, but not presented as a standardized laboratory result.
Internal test
A repeatable project-specific method with recorded conditions, measurements and evidence. Its scope and limitations stay attached to the result.
Third-party report
A report issued by the named laboratory under the identified method and scope. Applicability must be checked for the material, product, market and claim.
07 / Connect the evidence
From Lab question
to manufacturing action.
Use the related pages to place a material or test question inside the wider product-development and production process.
08 / Before using a result
Questions that protect
the conclusion.
A useful result remains connected to its sample, method and intended decision.
Is BSTAR Underwear Lab an accredited third-party laboratory?
This page is BSTAR’s product-testing and evidence hub. Internal observations and project-specific tests are identified as such. When accredited third-party testing is required, the laboratory, method, report holder, scope and validity must be confirmed.
Does one test result apply to every fabric or order?
No. A result applies to the identified samples and conditions. Changes in composition, yarn, knit, GSM, dyeing, finishing, trims, construction or care route may require a new review.
Can BSTAR confirm a pass grade before reviewing the project?
The applicable method and acceptance criteria depend on the product, target market, buyer requirements and claim. These must be agreed before testing or third-party submission.
When should testing be discussed?
Raise required tests during product development, before material and sample approval. This allows sample quantity, timing, test method, cost and decision points to be included in the project plan.
What should a buyer provide?
Share the product specification, target market, intended use, material and trim details, care instructions, required standard or buyer protocol, and the decision the result must support.
Plan the evidence with the product
Have a material or
durability question?
Share the product, sample stage, target market and the requirement you need to verify. The method, sample quantity, timing, cost and reporting scope are confirmed after review.