Switch the bottom to a higher setting before the top or vice versa. Higher settings add more heat. 4. Consider adding an Orton KilnVent. These pull hot gases from the top to the bottom of the kiln and cut most temperature variations in half. Hoods above the kiln will not help temperature uniformity problems.
Lusters are metal-based transparent overglazes available in rainbow colors.
They are applied over gloss, satin and matte glazes as well as porcelain bisque. Beautiful if applied over china paints, lusters can also be applied over other lusters. When fired they are iridescent. Lusters can be used to save streaky or unattractive underglazes or to give a new or different look to a piece. The most popular and perhaps best known luster is Mother of Pearl which has vari-colored appearance after firing.