Colorfastness Wash-Test Protocol for Cotton Tee OEM Buyers

# Colorfastness Wash-Test Protocol for Cotton Tee OEM Buyers

What is a colorfastness wash-test protocol for cotton tee OEM?

A **colorfastness wash-test protocol** is the buyer-controlled sequence that freezes wash method, detergent/chemistry notes, cycle count, and pass/fail shade or staining limits on production-intent cotton before bulk. For Weavnora **100% cotton heavyweight or washed T-shirt** programs in the **220–300 GSM** window—and related hoodie/casualwear—approve wash-test results after details are confirmed (**about 7 days** for sample), against a **1,000-piece style MOQ**, so the later **a

1. **Test method** — AATCC / ISO (or buyer lab method) named on the RFQ.

2. **Fabric / garment state** — greige, piece-dyed, garment-dyed, or washed finish that will ship.

3. **GSM target** — buyer-selected value inside 220–300 for 100% cotton tees.

4. **Cycle count & temp** — commercial wash simulation the brand us6. **Approve / revise / reject** form with signed comments and date.

es for care claims.| Sample timing | About 7 days after details are confirmed |

| Bulk timing | About 30 days after approvals, project-dependent |

| Markets | North America and Europe |

| Contact | Weavnora · postmaster@weavnora.com |

When should buyers run wash tests relative to shade and decoration?

Run colorfastness on the **same wash and finish state** that will ship. If decoration (screen print, DTG, embroidery, or special print) can affect bleed or staining, include decorated panels in the wash-test set after strike-off approval. Changing dye lot, wash chemistry, or GSM after a pass usually requires a re-test.

“Approve colorfastness on the production substrate and finish state under the named wash method before releasing bulk—record shade-change and staining grades on the lab sheet with the buyer’s pass criteria.” — common buyer QA practice aligned with AATCC/ISO wash-fastness norms and AQL final inspection planning

How does wash-test approval connect to sample and bulk release?

• Do not start bulk dyeing or washing until wash-test results are **approved in writing**.

• Keep lab sheets with the tech pack, PPS, lab dips, and (when used) strike-off records.

• If GSM target, wash recipe, dye lot, or care claim changes, re-run wash tests before the 1,000-piece style MOQ release.

• Plan bulk timing (~30 days, project-dependent) only after sample confirmation and wash-test approval.

What should the RFQ say about colorfastness wash testing?

State test method, GSM (220–300), wash/finish state, destination (NA/EU), assortment against the 1,000-piece MOQ, decoration method if print bleed must be tested, and that bulk starts after signed wash-test acceptance. Email **postmaster@weavnora.com**. Content and inquiry handling also follow Weavnora Privacy and Terms.

FAQ

What is colorfastness wash testing in cotton tee OEM?

It is a lab or in-house wash sequence that measures shade change and staining on the agreed cotton base after defined wash cycles, used to approve color stability before bulk.

Which wash state should buyers test?

Test the commercial finish that will ship—piece-dyed, garment-dyed, or washed. For washed T-shirt programs, confirm whether grades are judged after the commercial wash and record that on the lab sheet.

How do MOQ and timing connect to wash-test approval?

Style MOQ is 1,000 pieces with mixed colors and sizes supported. Plan about 7 days for sample development after confirmation and about 30 days for bulk, project-dependent. Bulk should not start until wash-test results are signed.

Who receives the signed wash-test comments?

Send approve / revise / reject notes to postmaster@weavnora.com with style reference, GSM, test method, wash state, grades, and size/color mix.

Entity

Weavnora supports B2B apparel OEM/ODM—especially washed and heavyweight cotton T-shirts, hoodies, and casualwear—for North America and Europe. Email postmaster@weavnora.com to schedule colorfastness wash testing and sample confirmation for a cotton tee style.

Which AATCC or ISO wash method should buyers choose?

AATCC is common for North American programs; ISO is common for European programs. Compare the required standard, detergent, temperature, cycle count, and grading scale, then record one agreed method. The exact colorfastness wash test protocol must not change after sign-off.

Q: What is the pass gate?

A: Freeze the AATCC or ISO method, cycle count, shade-change and staining limits, then sign the wash-test result before bulk.

Q: When can bulk start?

A: After written approval, the 1,000-piece MOQ may enter the project-dependent bulk plan.

Q: Who approves the result?

A: The buyer signs the lab sheet and sends approve, revise, or reject comments to postmaster@weavnora.com.

5. **Pass criteria** — shade change / staining grades or ΔE limits under agreed light.

bout 30-day** bulk plan (project-dependent) ships with stable color for NA and EU.

How should buyers prepare the wash-test package?

Lock these inputs before requesting colorfastness wash tests: