AATCC 157:2017 pdf download.Colorfastness to Solvent Spotting: Perchloroethylene
4.3 Perchloroethylene is toxic by inha- lation, 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 perchloroethylene va- pors at 100-400 ppm concentrations for prolonged times. Fabric saturated with this solvent should be dried in an ade- quately ventilated hood. Use chemical goggles or face shield, impervious gloves and an impervious apron when handling perchloroethylene. 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 must be controlled at or below levels set by governmental authorities (e.g., Occupational Safety and Health Administration’s [OSHA] permissible exposure limits [PEL] as found in 29 CFR 1910.1000; see web site: www.osha.gov for latest version). In ad- dition, the American Conference of Gov- ernmental Industrial Hygienists (ACGIH) Threshold Limit Values (TLVs) com- prised of time weighted averages (TLV- TWA), short term exposure limits (TLV- STEL) 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 perchloroethyl- ene vary from place to place; therefore, user must check local legislation regard- ing availability and handling require- ments.
9.1 Precision. Precision for this test method has not been established. Until a precision statement is generated for this method, use standard statistical tech- niques in making any comparisons of test results for either within-laboratory or between-laboratory averages. 9.2 Bias. Colorfastness to solvent spot- ting (perchloroethylene) 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.