Dry Cleaning Solvents - Cleaning Plastic Headlights.
ISO 6837:1982, Surface active agents -- Water dispersing power in dry cleaning solvents
From premixes containing different amounts of water and relatively constant amounts of the detergent and solvent dry cleaning solutions with the desired final concentration of detergent are prepared. The water solubilizing power of the detergent is determined by visula assesment of the optical density of the solutions, and, after adding water to those solutions that are still clear, the solubilized water content for a given concentration of detergent is determined. The water emulsifying power of the detergent is determined by observation of phase separation in the solutions, and, after adding water to those solutions in which the phases are considered not to have separated, the emulsified water content for a given concentration of the detergent is determined. This title may contain less than 24 pages of technical content.76% (15)
Step 7 **CHANGE GLOVES** Immerse in Lighter Fluid (naptha, etc.), and wiggle around for a few minutes, activate the aperture lever, it should now be lovely and smooth. Remove and dry, NO LUBE!!! Clean any residue with a Q-tip (ear bud). I personally used my fiancee's hairdryer to evaporate the naptha, opening and closing the aperture as it dried, to make sure no excess solvent was between the blades. Give it a good 10 minutes blow dry, everything must be bone-dry to work as directed. PS The lighter fluid goes BACK IN THE BOTTLE or IN YOUR LIGHTER. I nearly mistook it for water... Be careful of the rear of the hairdryer if you are also long haired...mine went right into the motor *ouch*!! Too much concentration on the mechanism :D :DTURI Wet cleaning demonstration
Over 80% of the U.S. professional garment cleaning industry today uses the chemical perchloroethylene to clean clothes. Studies have identified ecological and human health hazards associated with perc usage. Some dry cleaners use "wet cleaning", a machine-based process that uses water as the garment cleaning solvent. TURI is currently working with dry cleaners across the state to promote the use of wet cleaning. Educational and outreach efforts are underway to inform the cleaners about the harmful effects of perc and the benefits of converting to wet cleaning. A demonstration of wet cleaning equipment was held on October 14, 2007 in Lowell, MA to allow the cleaners to see first hand how the equipment works.
Evaluates the carcinogenic risks to humans posed by exposures in the dry cleaning industry by eight chlorinated solvents and related chemicals and by an additional group of seven industrial chemicals. Dry cleaning is evaluated in the first and most extensive monograph. Concerning exposures to specific chemicals, tetrachloroethylene is identified as the most commonly used solvent during the last two to three decades. The evaluation also considers exposure to the wide range of chemicals used in the treatment of spots. A review of epidemiological studies on dry cleaning indicates that the risks for cancers at two cites, urinary bladder and esophagus, may be increased by employment in dry cleaning. The monograph concludes that dry cleaning entails exposures that are possibly carcinogenic to humans. A second group of monographs evaluates selected chlorinated solvents and related chemicals used in dry cleaning, metal cleaning, and degreasing as chemical intermediates and in the production of insecticides and herbicides. Trichloroethylene, tetrachloroethylene, and 1 2 3-trichloropropane were classified as probably carcinogenic to humans. 1-Chloro-2-methylpropene was classified as possibly carcinogenic to humans. The remaining chemicals - chloral and chloral hydrate, dichloroacetic acid, trichloroacetic acid, and 3-chloro-2-methylpropene - could not be classified. For the remaining seven chemicals used in a diversity of industrial applications, vinyl fluoride was classified as probably carcinogenic to humans. Furan, benzofuran, and vinyl acetate were classified as possibly carcinogenic to humans. Acrolein crotonaldehyde and furfural could not be classified.See also:
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