"Maxwell Lol" wrote in message
...
"Ed Huntress" writes:

It appears that hydrochloric reacts noticeably with some glasses but not
others. It will leach out metallic ions from several types of glass,
leaving
a lightly etched, often irridescent surface on the glass.

I've seen pattens in glass what will only appear if you breathe on the
glass - the vapor in your breath causes the image to appear.

Any clues on to the acid to use, and techniques to apply the acid?

If you're asking me, Max, I have no clues. That one sounds pretty exotic.

--
Ed Huntress