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A blanket is a large piece of soft cloth. The item is typically used to keep warm, while sleeping or lying down. A blanket traps the radiant heat from the user's body; instead of dissipating into the air, it warms the user. It also protects against heat being lost by the processes of convection.
The term arose from the generalization of a specific fabric called Blanket fabric, a heavily napped woolen weave pioneered by Thomas Blanket (Blanquette), a Flemish weaver who lived in Bristol, England in the 14th century. Earlier usage of the term is possible through its derivation from the French word for white, blanc.
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Many types of blanket material, such as wool, are used because they are thicker and have more substantial fabric to them, but cotton can also be used for light blankets. Wool blankets are warmer and also relatively slow to burn compared to cotton. The most common types of blankets are woven acrylic, knitted polyester, mink, cotton, fleece and wool. Blankets also come with exotic crafting and exotic material such as crocheted afghan or a silk covering. The term blanket is often interchanged with comforter, quilt, and duvet, as they all have similar uses.
Blankets have been used by militaries for many centuries. Most militaries have blankets as compulsory for sleeping quarters in preference to duvets. Militaries are some of the biggest single consumers of woolen blankets. Military blankets tend to be coarse grey with a high level of microns, usually over 20. Suppliers include J. E. Ashworth & Sons and Faribault Woolen Mills who made half of all blankets in America at one time.
Throw blankets are smaller blankets, often in decorative colors and patterns, that can be used for extra warmth and decoration on the outside of bed. Blankets are sometimes used as comfort objects by small children.
Blankets may be spread on the ground for a picnic or where people want to sit in a grassy or muddy area without soiling their clothing. Temporary blankets have been designed for this purpose.
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