No wonder gum prints sometimes fail to clear—maybe there is a weenie test
that could be improvised from this article....
Mark Nelson
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In a message dated 4/28/05 2:35:08 PM, Grafist@aol.com writes:
> He mixed the glue
> intended for the sausage skin with bichromate of potash, and exposed the
> glued
> parts to the light. This made the glue insoluble, and now the artificial
> skin
> endured boiling water thoroughly well. The number of sausage skins prepared
> in
> this way, by the chemical action of light, amounted to many hundred
> thousands.''
>
Received on Thu Apr 28 15:46:19 2005
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