A major benefit to using Mayco Glaze is the reds and greens do not contaminate each other in the firing. Beautifully decorated Christmas items can easily be created using any of Mayco's reds and greens. White edges on corners or highly detailed items are due to the sharpness of the edge or detail. The best way to avoid white corners is to round the edge when cleaning the greenware. It is best to consider these white edges on detail as the highlight.
Highlights are the highest areas of an item.
Several things can contribute to this look, with the major cause being poor ventilation. Red glazes especially need plenty of air circulating evenly in the kiln for the color to develop. Insufficient glaze application can also result in this same look. A clean brush and work area will eliminate most of these specks. Yes, Red Glaze may be thinned.