Technical Question, Recycled Glass Compatibility

Sandy P. brings this question:

Hi Jodi,
I am in Tampa, Florida and heard about you from a friend who saw you on HGTV in Charlevoix, Michigan. I am new to fusing and love the idea of using "recucled" glass. I have a question for you. Do you mix the glass? It's always been instilled to me about using compatible glass? I've slumped a beer bottle for fun but haven't done any other experimenting. I'd really appreciate it if you would let me know. Thanks. I'll be watching for you ~
Sandy

Hi Sandy;

What you have learned is correct, EXCEPT when you reduce the size of the surface area to nearly non-existent proportions, i.e. crushed glass. Bedrock tile co. in Seattle has been doing it for about a long time, with no flux or additions.

I have one piece shown here on my blog that is mixed blue bottle glass and clear window. The piece is opaque and made with crushed glass scroll down to August 28 entry to have a look.

Let me know if you have additional questions,

Jodi