This past week I had another go at the 12″ backsplash tile for the downstairs guest bathroom. This time the tile turned out very well – no splits or breaks, in spite of a few bubbles forming. I was able to refire it a second time without splitting or breaking it this time. (You can read about the first try that didn’t work out here.)
The bubbles that formed in the first firing were about the same size and in the same places as the last time, so the slower firing schedule didn’t really affect the result at all. When I do the next backsplash tile, I will try firing with an even slower ramp on the initial two firing stages and a longer bubble squeeze hold time, just to see if either of those two changes will do anything to reduce the bubbles.
I also noticed a little devitrification on the dichroic glass squares in the bottom right corner. I’m not sure what happened there, other than the tile has been sitting on my workbench for a while, waiting to be fired. I did wash the glass before firing, so I’m not sure whether something might have splashed onto it that slid between the bottom glass and the dichroic glass squares. If something splashed in the crack, it wouldn’t have been cleaned out by a surface washing, so I’ll have to be more careful with that in the future.
Still, I now have a good firing to prove the idea for future use. It will be good to get this backsplash tile project finished and mounted in my bathroom! Then, it’s on to the screen printed red rock tiles for the new house.
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