Modify White clay residue in holes - Czech or Japanese? (6314329)

Modify message : White clay residue in holes - Czech or Japanese?
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Message	I recognize the tell-tale sign of white powdery mandrel release residue in the holes is an indicator of Czech lamp work - but did the Japanese also leave white residue in the holes, or do their beads - Cherry Brand, for instance - have clean holes? As I was cleaning the green verdigris from some of the brass beads, the rotted thread broke (fortunately over a towel). So I had an impromptu re-stringing project. As I was putting the broken strand back together, I noticed that the small green and maroon spacer beads had traces of the whitish residue, even after all these years. Display HTML as text.
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