Conn. Agencies Regs. § 19-13-E10 - Cleaning of wiping cloths
Rags sold or exchanged in commercial trade, to be used as wiping cloths, shall be washed with suitable detergents until they are free from gross soilage, provided during the process they shall be immersed in water at a temperature of not less than 160°F. for thirty minutes, and all portions of the rags shall be subjected to these time and temperature conditions.
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