AATCC 157-2017 Colorfastness to Solvent Spotting: Perchloroethylene.
4.2 All chemicals should be handled with care.
4.3 Perchloroethylenc is toxic by inhalation, by repeated contact with skin and by ingestion; it should be used only in a well vented atmosphere. Toxicology studies with laboratory animals have shown evidence of cancer in rats and mice exposed to pcrchlorocthylerie apors at 100-400 ppm concentrations for prolonged times. Fabric saturated with this solvent should be dried in an adcquatclv ventilated hood. Usc chemical goggles or face shield, impervious gloves and an impervious apron when handling pcrchlorocthylcnc.
4.4 An eyewash/safety shower should be located nearby and an organic vapor respirator should be readily available for emergency use.
4.5 Exposure to chemicals used in this procedure inuia be controlled at or below levels set by governmental authorities (e.g., Occupational Safety and Health Administration’s IOSHAI pennissible exposure limits [PELJ us found in 29 (‘FR 1910.1000; see web site:
www.osha.gov for latest version). In addition, the American Conference of Governmental Industrial Hygienists (AC(IIH) Threshold Limit Values (TLVs) cornpriscd of time weighted averages (TLVTWA), short term exposure limits (TLVSTEL) and ceiling limits (TLV-C) are recommended as a general guide for air contaminant exposure which should be met (see 10.1).
4.6 The laws regarding perchloroethylene vasy from place to place; therefore. user must check local legislation regarding availability and handling requireIflents.
5. Apparatus, Materials and Reagents
5,1 Pipette. graduated to deliver 1,5 mL
5.2 Plate, glass.
5.3 AATCC 9-Step Chromatic Transference Scale (AATCC Evaluation Procedurcfl)(sec 10.2).
5.4 White AATCC Textile Blotting Paper (see 10.2).
5.5 Perch loroethylene: technical or cornmcrcial grades arc acceptable.
6. Test Specimen
61 Piccc of dyed fabric. 25 x 25 mm (lx I in.).
7. Procedure
7.1 Attach test spccimcn to the center of a ISO x 150 mm (6 x 6 in.) piece of white blotting paper. Make sure the sample is flat against thc blotting paper. If necessary, staple the edges of the fabric down to keep the sample flat on the blotting paper.
7.2 Place blotting paper on the glass.
7.3 Deliver 1.5 ml of pcrchloroethylenc (by pipette) on the center of the Lest specimen.
7.4 Let stand in air until dry; then evaluate the staining on the blotting paper.
8. Evaluation Method for Stamina
8.1 Rate the degree of stain on the blotter using the AAf(’C 9-Step Chromatic Transicrunuc Scale LAATC(’ Evaluation Procedure (EP) 8] or Instrumental Assessment of Degree of Staining (EPI2). and record the numerical rating that corresponds to the appropriate one on it.
9. PrecisIon and Bias
9.1 Precision. Precision for this test method has no been cstablished Until a precision statement is generated for this method. usc standard statistical techniques in making any comparisons of test results for either wiglijn-laIw,raturi or between-laboratory averages.
9.2 Riar. Colorfastness to solvent spotting (perchloroethylcnc) can be defined only in terms of a test method. There is no independent method for determining the true value. As a means of estimating this property. the method has no known bias.AATCC 157 pdf download.