I have never heard of that but we tend to use titanium pens to inscribe on top of the glass, rather than etch into it if we decide to sign something. Marbles, for example, are often signed. Mine is a Ti Scribe Pen made by Ed Slawson of Playing with Fire! They advertise here on LE.
Sue
__________________
Sue Walsh
The past is history,
The future is a mystery
and the present is a gift.
|