This glaze is be applied on an unfired glaze !
In our example on Calypso A 0456 and Schwarz A 1007 gloss.
The thicker the application is, th bigger the indivdual 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 nt work with all glazes.
We recommend to test out a small amount first !