You need to experiment to find out the optimum firing temperature & rate for your glaze. If the temperature is too high, the colour will bleed. And if too low, the colour will not set. Most laser transfer decals fire permanently onto pre-glazed ware at cone 04 when using glazes that mature at cone 6 and higher. Most glazes that mature at cone 04 will accept laser decals fired to cone 06. Most commercial decals, chinapaints and lusters fire to maturity between cone 015 and 017.