Why lines in one piece of fired glass but not the other?

[Shelley Lewis]

The green glass in both of these fused blanks was cut from the same sheet and fired in the same load. Why did one end up with lines? I fused a total of 8 blanks from the same green sheet, and 3 have these lines. I think they look really cool, but I don't understand how they appeared. This is 96 glass if that makes any difference. Thanks for your insight!

[vblue]

Did you check the back of the glass before cutting? I noticed that some of the newer Spectrum colors have lines towards the edge of the glass and it doesn't fire away.

[Shelley Lewis]

Did you check the back of the glass before cutting? I noticed that some of the newer Spectrum colors have lines towards the edge of the glass and it doesn't fire away.

Yes, I did. There weren't any lines prior to firing. Thanks for your reply!

[Shelley Lewis]

Does anyone else have an answer?

[Bert Weiss]

When you fully fuse glass, one color sinks in to the surrounding color. It is possible that the colors in the sheet realigned themselves in a fuse firing. Streaky glasses have varying patterns, especially beneath the surface.

[Shelley Lewis]

When you fully fuse glass, one color sinks in to the surrounding color. It is possible that the colors in the sheet realigned themselves in a fuse firing. Streaky glasses have varying patterns, especially beneath the surface.

Thanks, Bert. I have never had this happen before, so I'm glad to know it can occur when I least expect it! This was system 96 Celadon, just in case anyone reading this wants to know the specific color.

[charlie]

have you asked Spectrum?

[Shelley Lewis]

have you asked Spectrum?

No, I didn't think about doing that, but I will. Thanks!