Cons Devitrifies under the most careful circumstances. I am going to have to throw this out. It seems to do ok under a tack fuse but otherwise is honestly just junk.
Pros There are no pros. Its black and cheap. As long as you don't try and fuse it you are probably fine.
Cons This glass devitrifies even when fused with care. I am honestly throwing this away. I might be able to use it in stained glass panels but it is just not fusible.
Wissmach Black Opal Thin - 90 COE
Cheap.
Devitrifies under the most careful circumstances. I am going to have to throw this out. It seems to do ok under a tack fuse but otherwise is honestly just junk.