Colorants and printing techniques commonly used in ceramic decoration
Colorants commonly used in ceramic decoration
Ceramic decoration can adopt several methods such as coloring of raw mud, coloring of glaze, coloring under glaze and coloring on glaze. Colorants are divided into:
Billet mud coloring agent: mixing the coloring material in the bad material and sintering and forming. Therefore, it is required that such colorants can not react to the processing of the blanks;
Glaze coloring agent: used to decorate dry blanks, plain fired blanks or fired white porcelain, apply glaze on them and then fire them. It is required that it should not react with glaze at normal firing temperature, and must not flow or have blurry patterns;
On-glaze coloring agent: used to decorate the surface decoration of glazed fired products. It is required to be firmly attached to the glazed surface at a relatively low firing temperature (700 ~ 900 ℃) and not penetrate into the glaze and flow.
Indirect ceramic decoration process
The indirect ceramic decoration process is divided into two major processes: ceramic on-glaze decals and ceramic under-glaze decals.
Method of making ceramic decals by indirect method (printing method)
There are three printing methods for making ceramic decals, namely hand-carved copper gravure gravure ceramic decals, offset printing large-film decals and screen-printing film decals.
Decal paper on ceramic glaze is divided into categories according to the decal process
The decals on ceramic glaze can be divided into transfer decals and transfer decals according to different decals.
How to deal with organic binder used in decoration
Some organic adhesives are needed for ceramic decoration by decals, hand-painting, screen printing, etc. These adhesives should be gradually volatilized or burned during the initial period of color burning, and must be completely eliminated before the initial melting of the flux.
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