AATCC 158-2000 Dimensional Changes on Drycleaning in Perchloroethylene: Machine Method.
4. Safety Precautions NOTE: These safety precautions are for information purposes only. The precautions are ancillary to the testing proce- dures and are not intended to be all inclusive. It is the user’s responsibility to use safe and proper techniques in handling materials in this test method. Manufacturers MUST be consulted for specific details such as material safety data sheets and other manufacturer’s recommenda- tions. All OSHA standards and rules must be consulted and followed.
4.1 Good laboratory practices should be followed. Wear safety glasses in all laboratory areas.
4.2 All chemicals should be handled with care.
4.3 Perchloroethylene is toxic by inhalation, by repeated contact with the 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 vapors at 100-400 ppm concentrations for prolonged times. Fabric saturated with this solvent should be dried in an adequately 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 The drycleaning apparatus should be ventilated to the outside atmosphere in accordance with the manufacturer’s instructions.
4.6 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 ex- posure limits [PEL] as found in 29 CFR 1910.1000; see web site: www.osha.gov for latest version). In addition, the American Conference of Governmental Indus- trial Hygienists (ACGIH) Threshold Limit Values (TLVs) comprised 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 ex- posure which should be met (see 13.2).
5.1 Perchloroethylene (commercial), CCl 2 = CCl 2 , drycleaning grade.
5.2 Sorbitan monooleate (a typical chemical is Span 80). 6. Apparatus and Materials 6.1 Drycleaning machine. This shall consist of a commercial rotating cage type, totally enclosed machine for use with perchloroethylene. The diameter of the rotating cage shall be not less than 600 mm and not more than 1080 mm. Its depth shall be not less than 300 mm. It shall be fitted with three or four lifters. The speed shall be such as to give a gfactor (see 13.3) between 0.5 and 0.8 for cleaning and between 35 and 120 for ex- traction. The machine shall be equipped with a thermometer for the measurement of the solvent temperature.AATCC 158 pdf download.