This glaze is to be applied over an unfired glaze !
In our example on Fire-engine Red A0456 and Black A1007 gloss.
The thicker the application is, the bigger the individual glaze dots appear.
The application on a black clay mass without glaze underneath, is also very striking.
Since there is a chemical reaction of the two glazes, it does not work with all glazes.
We recommend to test out a small amount first !