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<p>[QUOTE="Bronwen, post: 4165583, member: 5833"]What's helpful is the way Celluloid looks by comparison to the other samples.</p><p><br /></p><p>Edit: Their Celluloid item looks very dark under the UV, but I have a couple in my display cabinet that absorb the light the same way ivory does. On my tagua nut items, the outer layer reflects the purple back, places that are cut down deeper stay quite white. Antler also is absorptive to a degree.</p><p><br /></p><p>What I have noticed in general is that natural materials absorb the UV more than artificial ones. Celluloid may seem like an exception, but it is based on cellulose.[/QUOTE]</p><p><br /></p>
[QUOTE="Bronwen, post: 4165583, member: 5833"]What's helpful is the way Celluloid looks by comparison to the other samples. Edit: Their Celluloid item looks very dark under the UV, but I have a couple in my display cabinet that absorb the light the same way ivory does. On my tagua nut items, the outer layer reflects the purple back, places that are cut down deeper stay quite white. Antler also is absorptive to a degree. What I have noticed in general is that natural materials absorb the UV more than artificial ones. Celluloid may seem like an exception, but it is based on cellulose.[/QUOTE]
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