The National Museum of American Coverlet, based in Bedford, Pennsylvania, has an extensive collection of printed cotton coverlets with traditional designs created in the mid-19th century. Today's coverlets come in a variety of cotton textures and weaves, including sateen, Egyptian and Pima, which is grown domestically. High-grade Pima cotton is economical, absorbs dyes well and maintains shape when laundered.
Place cotton coverlet into the washing machine, pushing it to one side so it will not tangle around the agitator. Measure detergent according to package instructions. Avoid bleach as it may weaken cotton fibers. Wash with plenty of cold water on gentle cycle.
After the rinse cycle, place coverlet in dryer and tumble dry on low temperature setting. Take coverlet out of the dryer while it is damp. If possible, reshape and stretch it as cotton textiles are susceptible to shrinking. Lay coverlet over a flat surface until it is completely dry, and smooth with an iron if it dried with wrinkles and creases.
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If your cotton coverlet is accidentally stained, you may be able to remove the spot without a complete re-washing. Place the coverlet on a table protected by clean rags or paper towels. Dampen a clean cloth with stain-removing detergent and pat the underside of the stain, working from the outside to the center to prevent it from spreading. The stain will eventually transfer to the paper towels or rags beneath it. Repeat this procedure until all traces of stain are gone. Dry in a well-ventilated area.