Stumper Detail

Date: Monday, January 1, 2001 
Question/Topic: Dyes and dyeing - making colorfast 
Answer/Pointer: Dyes and dyeing - making colorfast The Rit Consumer Service Laboratory offers this method of setting color. Prepare a bath containing 2 or 3 gallons of hot water in which are dissolved 1/3 to 1/2 ounce (1 teaspoon) of copper sulfate crystals (available at drug stores) and 1 cup of white household vinegar. Heat this solution until it is just hotter than hand-warm, about 120 to 140 degrees Fahrenheit. Wet the dyed fabric and then immerse it in the solution and stir the article for half an hour. Rinse it thoroughly in cool water, then dry. Although this procedure will help set the color, it may also dull the shade slightly. Be careful to keep the setting solution out of the reach of children because copper sulfate is poisonous. 
Librarian: LCLCPL 

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