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What is a pink eraser made of? It totally stumped me.
Question Date: 2003-02-06
Answer 1:

Erasers are made of materials with long chain-like molecules called polymers. Polymer materials are usually transparent. That is, they have no color. To give the eraser its pink color, one just needs to add a small amount of dye molecules --- molecules that are specially good in imparting color. The same molecules are used to make white cotton into pink cotton (like in a T-shirt).

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