This wax emulsion is one of two resist products used in many fired color techniques. The wax emulsion repels color from the coated area and fires off. If colors adhere to the wax it must be removed prior to firing as it can stick to the ware. This is especially true with any glaze “beads” that may form on the wax. Any color left on the wax that is used on top of an unfired glaze will adhere to the underlying glaze during the firing.