This simple technique allows you to make a glaze speckled with another.

It makes use of a process called sintering, where the glaze is heated enough for the ingredients to permanently fuse together without getting hot enough to melt. The sintering is crucial to this effect, as unsintered glaze chunks will just dissolve when added to another glaze, but if you heat them to the point of melting then the chunks will stick together.

The exact temperature required for sintering will depend on your glaze. There are multiple factors that affect it, such as iron content. For my cone 6 glazes, I’m sintering at 750-800c or cone 017-015. I’d suggest starting there are seeing what happens with your glazes.

This is my process: