Production of glazed glass

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Production of glass glaze:
   The production of glazed glass includes the production of colored glaze, glazing, drying, heating, quenching or annealing, cooling and other processes.
   The production of glass glaze consists of two basic materials, base glaze and pigment. The base glaze is powder made from fusible glass frit; the pigment is an inorganic coloring substance, which can be an inorganic compound or several inorganic compounds. The compound is made by grinding, mixing, sintering and grinding into powder in a certain proportion.
(1) Base glaze
The function of the base glaze is to highly disperse the inorganic pigments, and melt them on the surface of the glass substrate at a lower temperature, and melt into a whole with the substrate; when the base glaze is melted, the inorganic pigments with strong coloring ability will dye it into Color glass, this layer of glass is combined with the glass substrate into a whole to become colorful glazed glass.
The process performance requirements of the base glaze: the melting temperature is low, and it can be melted on the surface of the glass substrate before the glass substrate is softened; it has good chemical stability and luster, and does not chemically interact with inorganic pigments, and does not cause the color of the inorganic pigment itself. Change; the expansion coefficient is very close to that of the glass substrate. When the temperature changes, the glaze does not crack or shrink.
(2) Pigment
Pigment, which is a kind of metal oxide or compound, can also be obtained by grinding, mixing, sintering, washing, filtering, drying, and grinding into fine powder according to a certain proportion of several metal oxides or compounds.
For pigments of various colors, the selected metal oxides, mild, sintering temperature and sintering time are different depending on the pigment.
The degree of dispersion of the pigment in use is closely related to the size of its particles. The smaller the particle, the greater the degree of dispersion (the particle is generally less than 5цm).