Test Tiles

I’m still testing a bunch of different slips and glazes and I like to apply them to tiles that can be used later on. These are each about 3″ square and 5/8″ thick, basically sturdy floor tile. LibertyTown has old tests installed all over the place!
I raw glaze most of my work (except for pots with crackle slip) and I had a problem with a lot of the glaze on glaze pouring that I did…the top glaze seems to pull the bottom glaze right off the rim and they both fall off. I’m not sure if it’s a recipe problem or an application problem…or a shino problem, since that’s the two base glazes that are troubling me.