Q-using copper and maganese carbonate in glass

[dave laporta]

I know there is alot in the archives on this topic but what I did not see is how I apply them. I just did a test firing with float glass (top temp being 1515) and the results were pretty lame. all but one tile turned a dark, metal like black finish... real ugly. the one that sort-of came out only started to turn the greenish blue color when it was just a sprinkle of the powder. What I did was apply it between the sheets in varing thickness to try to understand what my tolerences were. Other tiles that the layer was on the thick side did not allow the glass to fuse fully and the chemical leaked out- agh :? Overall I did not get a mix or blend of materials. Should I be? Is there an ideal temp?

In the archives I did see one mention of using a flux or mixing it with hot water then spray it on. Can anyone shed some detailed light on this? TIA- Dave

[Brian and Jenny Blanthorn]

I know there is alot in the archives on this topic but what I did not see is how I apply them. I just did a test firing with float glass (top temp being 1515) and the results were pretty lame. all but one tile turned a dark, metal like black finish... real ugly. the one that sort-of came out only started to turn the greenish blue color when it was just a sprinkle of the powder. What I did was apply it between the sheets in varing thickness to try to understand what my tolerences were. Other tiles that the layer was on the thick side did not allow the glass to fuse fully and the chemical leaked out- agh Overall I did not get a mix or blend of materials. Should I be? Is there an ideal temp?

In the archives I did see one mention of using a flux or mixing it with hot water then spray it on. Can anyone shed some detailed light on this? TIA- Dave

I have posted a lot on this

Realy is a big subject

First what do U want 2 achive ??

Body stains / onglaze + flux will give less bubbles

U need flux 2 melt the materials in

The higher temp U go the more disolved but the more bubbles + other problems

Thry a search on

Body stains / onglaze look out 4 some of my long posts on this