Ceramic coating engobes. we supply a wide range of ceramic glossy and matt glazes, specifically formulated for the requirements of glazed ceramic surfaces such as resistance, transparency, brightness, depth, smoothness, gloss, cleaning easiness and color development. After 300, they also began to use black and dark-brown glazes, probably inspired by black lacquer. these were the first in china's long tradition of dark-glazed ceramics. the new colours were achieved by using an iron-rich clay for the glaze, or by adding iron to the glaze mixture already used for the green wares. Nov 21, 2019u00a0u00b7 make sure the glaze cools to room temperature before you use it, as it will thicken as it cools. all of these glazes can be made up to five days in advance and stored in the refrigerator. the ham: the recipes enough to glaze an eight- to 10-pound ham. to use these glazes, brush them on several times near the end of the hamu2019s baking time. Find a dealer. choose your state or country (outside the us) to find a store near you.