Decomposition:
Is caused by long-standing humidity. Thereby are extracted alkalies from the frit, the surface becomes cloudy, in the further course scaly and finally the glass becomes “blind”.

 

Diamond grinding:
It is a grinding method with an especially striking impression.
 

Diatretglas:
It is a double-walled glass tumbler which external wall is dissolved net-like and connected by thin glass bars with the internal wall.

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