Adjust firing schedule after multiple firings?

[MollyFrey]

I'm using COE96. I'm going to be working on a project that may require up to 4 firings. I'm testing some small tiles and after the 3rd firing, I'm seeing some slight incompatibility between Oceanside clear, bronze, and light amber. I have not changed the firing schedule for any of the firings.

Do I need to adjust the schedule after the 2nd or 3rd firing or is this something that just happens to some colors?

Thanks for any information

Molly

[Kevin Midgley]

it is heat work that is causing the chemistry of the glass to change.
I do not fire multiple firings. Do it in one firing and you won't have the problem.

[jim simmons]

What Kevin said.