During the glazing process, technicians may experience the opaque on the cervical or the facial where the porcelain layer is very thin to shine through — here are some staining techniques that may assist in future cases:
During the second round of opaquing, try to characterize your margins with some brown, sand colored or even pink opaque blended with regular opaque at a ratio of 10:1 (opaque: color opaque) — this step will help enhance the natural blend of colors.
Thin spots on the facial may be covered during the second round of opaque firing by using a mixture of purple plus grey — blended together and then making a ratio of 10:1 (opaque: color opaque) — this layer creates more depth perception when later covered with dentin and enamel.
Just prior to glazing, add stains for characterization or adjust the shade and fire the units at a glaze firing cycle — the temperature should be 50°C lower than the dentin firing. This step helps to cure the stains and will not harm the porcelain — corrections to the stains can still be made at this point.
Glazing should be done with regular glaze material at the manufacturer recommended temperatures.
For more information, call your local dealer or BEGO USA, 1.800.342.2346 | www.begousa.com