Boron Silly putty
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3D3DSilly putty.
Silly putty contains about 4% boric acid, which is critically important for its bounce characteristic. See here for a reference.
Source: Ed Pegg Jr
Contributor: Ed Pegg Jr
Acquired: 10 December, 2002
Text Updated: 11 August, 2007
Price: Donated
Size: 1"
Purity: 2%
Boron