Concepts Underglaze for bisque by Duncan
The first coat is translucent. The second is semi-opaque. The third is opaque. Normal use is to apply 1-3 coats on bisque, let dry and cover with two coats of your favorite clear glaze.
Use them as Majolica paints on top of unfired non-moving opaque white or light colored glaze. No need to clear glaze as Concepts are shiny when fired. Try using them on tile, at cone 6 (on appropriate clay), in a spray bottle, these paints are versatile.