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|Re: Help with new glass bead technology -- Rosanna||Post Reply||Edit||Forum||Where am I?|
"Sol gel" coatings seem to be the norm now for purple Czech seed beads - you can see them at the Preciosa site. Very appealing, but will fade in sunlight. Watch out for anything labeled "Terra," it's dyed.
There is also a sputtered (?) metallic coating ("Crystal Colored Luster") that produces a violet purple over colorless transparent glass, which would of course be abraded off in a tumbler. Loupe inspection reveals this coating.