Best COE red glass for high fire melts

[Lee Sorg]

I'm new to the Warm Glass forum, so first, thanks for including me. I am doing high fire temparature melts and discovering that transparent red does not stay red once it reaches high temps of 1700 degrees. The red turns a muddy liver brown, kinda yucky looking. So my question is, what, if any, COE90 reds work well for high fire melts and pours? Thanks in advance for your answers.

[Brad Walker]

The transparents will usually turn opaque and ugly.

Of the opaques, 0024 Tomato Red seems to hold up best. The 0124 Red often reduces to brown.

[Lee Sorg]

Great. Thanks Brad.

[jim simmons]

Can you try an oxidizing atmosphere?
Jim

Great. Thanks Brad.

[Brad Walker]

Can you try an oxidizing atmosphere?

You could, but it's bad for the kiln elements.

[Lee Sorg]

Thanks for the suggestion Jim. I'm not sure how to oxidize the atmosphere in a kiln. But it sounds like this would not be a safe approach anyway. I did go ahead and order the 0024 Tomato Red — it looks like using this glass will work. After my first attempt using transparent red did not work out so well, I need a path that will yield a predictable result. Thanks again, all your feedback is much appreciated.

[rosanna gusler]

Can you try an oxidizing atmosphere?

You could, but it's bad for the kiln elements.

Isn't it opposite of that? A reducing atmosphere will strip off the protective oxide coating that is on the elements.

[Morganica]

You have to move to casting glasses to find a red that will work in high fire melts. Look at Burnt Scarlet Striker--it holds up very well to the heat. It is not a pure fire-engine red, however--it's got a bit of an orangey cast and is a little dark in thick castings. In thinner applications, such as pot melts, it'll probably look fine.

[Lee Sorg]

Thanks Cynthia, I'll give the Burnt Scarlet Striker a try.
btw: Very cool piece!