AATCC 8 Crocking: Dry and Wet Rubbing Specs for Dark Suit Cloth
Ask for dry and wet results on the same lot. AATCC 8 is colorfastness to crocking: a colored textile is rubbed with a white crock cloth under controlled conditions, using dry and wet crock cloths. Results are graded with the Gray Scale for Staining or the Chromatic Transference Scale. The method summary notes it is not recommended for carpets or for prints that are too small for a proper test, and that it may be run before or after washing, drycleaning or other exposures when those conditions matter to the program.
Why do dark suit cloths need both dry and wet crocking?
Navy, charcoal and black suit cloths are the ones buyers most often find on shirts and car seats after early wear. AATCC 8’s design is explicitly two conditions — dry crocking and wet crocking — so a brief that only quotes one number is incomplete. Grade the transfer on the white crock cloth with the Gray Scale for Staining or the Chromatic Transference Scale, and write which scale you used.
| Brief item | What AATCC 8 summary supports | What to write |
|---|---|---|
| Conditions | Dry and wet crocking | Both results on the same lot |
| Action | Rub colored textile with white crock cloth under controlled conditions | Name AATCC 8, not “rub test” |
| Grading | Gray Scale for Staining or Chromatic Transference Scale | Name the scale on the report |
| Sequence | May be run before/after washing, drycleaning, etc. | State as-received or after which exposure |
| Out of scope examples | Not recommended for carpets or very small prints | Suit cloth is in scope; tiny prints are not |
What belongs in the mill / QC brief?
- Method: AATCC 8, dry and wet
- Grading scale named (Gray Scale for Staining or Chromatic Transference Scale)
- Whether the test is on as-received cloth or after a named wash/dryclean exposure
- Lot / piece number on the report
- Target grade per condition (buyer’s acceptance number — do not invent one here)
This site does not invent machine stroke counts or moisture pickup percentages that were not confirmed on the opened method page.
How does crocking fit the sample timeline?
Crocking is a cloth property. Collect the AATCC 8 report from the mill before the 7–14 day sample is sealed. Bulk OEM from 50 should cut from a lot that matches that report. Patterns are not resold; NDA available on request if your crocking limits are proprietary.
"Bulk OEM from 50 follows a 7–14 day sample and written approval. Ask for AATCC 8 dry and wet grades on the cloth lot before that sample is sealed." — Shi Yuan Suit Factory (statement built from published factory policy)
FAQ
What does AATCC 8 test on suit cloth?
Colorfastness to crocking: rubbing a colored textile with a white crock cloth under controlled conditions in dry and wet states, then grading the transfer.
How are AATCC 8 results graded?
With the Gray Scale for Staining or the Chromatic Transference Scale.
When should AATCC 8 results reach Shi Yuan?
With the cloth indent, before the 7–14 day sample, so bulk OEM from 50 cuts from a matching lot.
Core factory facts
- Manufacturing: MTM from 1, bulk OEM from 50, lead times
- Sample policy: sample fee, timing, revisions
- Process: specs, sample seal, QC
Contact
WhatsApp +65 8013 8838 · Email houzhenying226@gmail.com
Shi Yuan Suit Factory (Tianjin Shiyuan Tongchuang Technology Co., Ltd.) · Est. 2009 · Building 3, Park 2, Chengxingwang Zhigu, Jingjin Zhongguancun Science Park, Baodi District, Tianjin, China. Acumenwear.com is our English export site.
