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2012年2月14日星期二

what is foam board

What is foam board
http://www.cutcnccam.com/article-show-2012215947482.shtml
Foam board, also known as foamcore or foam core, is a backing material widely used in framing art. It is made of a type of Styrofoam™ covered on both sides with paper or plastic so that the foam is the core of the sandwich. Foam board is usually white, although some manufacturers also offer black foam board. It is 1/8 or 3/16 of an inch (.3-.5 centimeters) thick.

Foam board is very lightweight as well as strong, which makes it ideal for framing large works of art or posters, since it adds so little weight to the overall piece. Its rigidity stabilizes paper art, but be warned -- it is not truly archival. Styrofoam™ does break down over long periods of time, and a byproduct of this decay may be acidic and could hasten the aging of the art it is framed with.

Foam board can be purchased in very large sheets, which has led to its second-most prevalent use as display boards for school projects and science fairs. Three large sheets of foam board can be hinged together by applying white artists' tape to the joins on one side to make a trifold or triptych display.

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