What is ceramic pigment
Ceramic pigment
Category:
Ceramic ceramic colors refer to powdered metal oxides and other blends used in ceramic glazes, as decorative ceramics, porcelain, terra-cotta, and also in porcelain enamel for decorative metal objects. When in powder form, most ceramic pigments are off-white. When works are calcined in ceramic kilns or pottery kilns, their rich and brilliant colors are revealed. Ceramic pigments usually contain fluxes and ingredients that make them difficult to paint. In England, ceramic pigments are called porcelain pigments.
The preparation process
Fold hybrid
The final hue of a colorant is greatly affected by the addition of other components to the colorant. Therefore, in order for each batch to produce the same hue, it is necessary to weigh and mix carefully according to the material of the same composition and quality.
Fold the calcination
Calcination is an important process for making colorants, and its purpose is to stabilize them. During calcination, different reactions occur due to the different properties of raw materials and the different colors desired. The lowest calcination temperature should be the same as that of the final product.
Folding water to wash
After calcination, the colorant is crushed and then washed for the purpose of removing all soluble substances. Chromate colors must be washed in hot water. If there is any soluble chromate left, there will be an uneven shade around the chrome color. If borate is not removed, a film will be produced on the color.
Folding pieces
After washing, the fineness required for wet grinding is obtained by using a disc mill or ball mill. Although there is no explicit requirement for the size of color, the general requirements are all through the 300 mesh screen. Inadequate crushing may be difficult to use due to uneven grain size and lack of covering power resulting in blotchy burning. On the contrary, excessive fine crushing, such as dust, can not be fully fused in the glaze and become the cause of rolling glaze.
1. Vanadium Yellow material Series:
(Zr - V)
A. The glaze with good fluidity and high boron content or low silicon content shows bright color in zirconium opalescent glaze;
B. Proper amount of ZnO in the glaze is beneficial to hair color;
C. The color shall not be ground too fine when used, otherwise it will weaken and become colored.
2. Praseodymium yellow Material series:
(Zr - Si - Pr)
A. In high boron and low silicon fusible glazes, the color is bright and bright;
B. The color in zirconium opacite glaze is better;
C. It can be colored in all types of base glazes.
3. Orange material Series:
(Ti-SB-CR) The highest use temperature is 1280℃.
A. It should be used in the titanium glaze; otherwise, it will change color;
B. ZnO and SnO2 in the glaze are favorable for the color development of the pigment;
C. The amount of ZnO2 in the glaze should be less than 10%, and the PbO content should be as low as possible;
D. Do not mix it with tin-containing color, or it will change color;
E. Suitable for firing in oxidizing atmosphere only.
4. Vanadium zirconium blue material Series:
(ZR-SI-V) The highest service temperature is 1300℃. Our products are KL-003021 and KL-333021.
A. It has the best color in zirconium opacified glaze;
B. Excessive amount of ZnO in the glaze will make its hair color become shallow;
C. Excessive amount of BaO in the glaze;
D. Bright color in PbO glaze.
Application
(1) Body coloring: mix the colorant and blank to make the body appear certain color after burning.
(2) Glaze coloring: color agent and base glaze can be mixed with various color glaze and artistic glaze.
(3) Decorative pattern drawing: it is widely used for manual painting on glaze surface and under glaze, and can also be used for decal paper, screen printing, etc.
classification
1. Ceramic pigments can be divided into:
Pigment over glaze pigment under glaze pigment within glaze
To put it simply, glazes are the boundary; Below the glaze is below the glaze. The one between the two glazes is the glaze. Above the glaze must be the glaze.
2. Classification of ceramic pigments according to mineral phases
3. There are powder and ceramic inks according to the state, that is, water agent.
