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Casein: imitation tortoise shell
- Comments Off on Casein: imitation tortoise shell
Casein identification guide: casein is a thermoset semi-synthetic polymer made from milk, hardened in formaldehyde
5. Most often opaque, although there are some translucent and transparent buttons.
source: Button Materials A-Z: Identification Guide
by Jocelyn HowellsButton Specs
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Material
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Designs
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Characteristics
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Types
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Usages
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