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So after a dozen more tests, it appears it may have been a reaction between the black and the bullseye thin fire paper. Once I convinced the kiln operator to fire without the paper the problem seems to have resolved. We ran a few more loads just to make sure it wasn’t a fluke… and so far so good. No...

I EDIT: 1. Just noticed that the problem only happens wit the one set of kilns. Is it possiblle that those kilns are all contaminated? You said that your silver stain was over-fired there. Maybe something else was. 2. Does anyone else who uses those kilns have the problem? Over to someone who might...

So far only I have had this issue… but I’m also the only one trying to paint at the studio. All the other users slump and fuse. I’m a bit of a novelty here.

Instead of glycol and water based mediums, use A-14 or pine oil. Your problem is probably the medium But why would that be? If it’s a medium issue, then wouldn’t I see the same results in either kiln? If I've read your post correctly, the problem occurs in electric kilns, but not gas kilns. The bin...

Barry Kaiser wrote: ↑Mon Nov 04, 2024 4:19 pm Instead of glycol and water based mediums, use A-14 or pine oil.
Your problem is probably the medium

But why would that be? If it’s a medium issue, then wouldn’t I see the same results in either kiln?

So I’m struggling with what I can only think to call “halos” around my painted lines. This is to say that I’m experiencing a strange film on my glass after it has been fired, but this film is conspicuously absent in the form of a halo around each line. If this were happening on purpose it might be n...