You can end up with an expansion coefficient problem if you
aren’t careful about combining glass, because believe me I have
I make wall pieces (although I make beads for friends once in a
while) and use the lumps to texture the surface. I find the best
way to not experience any pinging and problems in the future is
to use the same glass/enamel for the surface as for the lumps. I
do use beads sometimes, crushed and uncrushed but once again you
have to be careful or they cool at different speeds and cause
crazing where they meet.
Buying flat out lumps from Thompson as some have suggested is a
great idea for the few I know I will be using on a regular basis.
I will try the copper foil idea (which is a good one, I’ll just
apply the enamel real lumpy to the foil) because I don’t always
know ahead of time exactly what color lumps I want.
Thanks for your help everyone,