Ceramic cups is divided into three types: on-glaze color, under-glaze color and in-glaze color. Experts point out that heavy metals are mainly derived from pigments on the glaze. The lead compounds in the overglaze ceramic cups can be permeated by acid. When food is in contact with the picture, the lead may be permeated by organic acids in the food. Of course, if the glaze is properly planned and the grilling process is proper, it can prevent overlead.

a. The glaze color ceramic cup is made of flower paper attached to the glaze surface or directly painted on the surface of the product with paint, and then baked at a low temperature, because the baking temperature does not reach the degree of melting of the glaze layer, so the flower The surface should not sink into the glaze. Touch the overglaze ceramic cup with your hand, and feel the flower surface has a significant unevenness.

b. The baking temperature of the glazed ceramic cup can make the glaze melt, the pigment can sink into the glaze, and be covered by the glaze layer after cooling, the product is smooth in appearance, and there is no obvious unevenness in the hand touch; Discoloration, safety and health advantages.

c. All the underglaze ceramic cups are decorated on the porcelain blanks. After glazing, they are fired once at high temperature. The flower surface is covered by the glaze layer, which looks bright and flat, and the hand feels lubricating. Strengths.