Typically fire to 1300F. Adding color from the enamels is the last step. The temperatures of the enamels need to be scheduled. Higher temperatures fired first. Enamels are transparent. Continue this procedure until the depth is to your liking.
Enamels mix with the same binders and in the same procedure.
If I am not matting with the enamel, I like to use the squeegee oil as the binder. The squeegee oil gives a rich shiny hue to the color and texture of the enamel. Just a few questions, will be addressed. Not recommended if gum Arabic was the binder. Oil used, as the binder will make glossier lines for the trace.