One coat will create a translucent finish with subsequent coats increasing opacity. Mayco suggests 2-3 coats for opacity and all over coverage. Let dry between coats. They will fire to a gloss finish without clear glaze. However, if desired, a clear glaze may be added. For application on clay, we recommend leaving an area unglazed, such as the back or the bottom of the ware, to allow for out-gassing of water and organic materials during the firing process. They have been formulated to mature at cone 06/05. Most will maintain their color at higher firing temperatures, however, we recommend testing prior to use. All will show their performance changes at cone 6 on the side of the bottle.