These overglaze colors are for use on glazed pottery, enameled metal and glass. They may be brushed, stenciled, silk screened or air brushed. Colors fire with a semi opaque, brilliant sheen at cone 018-016. Special Note: Red and Yellow may be mixed with each other but not with other colors, and the other colors can be mixed together but not with Red or Yellow.( sounds a little to much like some people) Prices reflect a 20% discount from list price. The Oil Base Versa colors are only produced in a 2 ounce size. We still have some of the 1/4 oz. sizes available below. versa Black - 1/4 oz. versablk$4.45 White - 1/4 oz. ob12$4.20 Blue - 1/4 oz. ob22$4.40 Green - 1/4 oz. ob46$4.20 Red - 1/4 oz. No longer produced in this size, only 2 oz. size is available, special order only, $30.24, 1 800 290 8990 ob54 Yellow - 1/4 oz. ob60$4.04