Casein was also used for a bulking agent in
more 'traditional' compositions, but has here been fully polymerised into a form
of plastic sharing some properties (texture, styrene-like brittleness, 'Ivorene'-like colour) with some celluloids.
Believed to be a Boer War keepsake/trinket
I must thank Mercator Trading's Adrian for letting me photograph this, a while
ago now; another thing that's been languishing in Picasa!
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