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    Home > Coatings News > Paints and Coatings Market > Titanium white pigment inorder surface treatment and ink color matching

    Titanium white pigment inorder surface treatment and ink color matching

    • Last Update: 2020-12-27
    • Source: Internet
    • Author: User
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    First of all, let's talk about the effect of titanium dioxide pigment surface treatment: from the optical effect, the particle size of
    T iO 2
    should be controlled at
    0.2
    to
    0.3
    μ
    m
    is the best, in this particle size range pigment for the maximum visible light scattering force, can obtain the highest masking force, color resistance and pure whiteness. However, such a small particle size has a large surface area, more prone to photochemical reactions, so that pigments less resistant to powder. Through surface treatment, the contradiction between small particle size and anti-powdering is solved, and the optical properties and pigment performance advantages of small particle size are also played.in the case of titanium dioxide pigments produced by chlorination, a small amount of
    Cl 2
    ,
    T iCl 4
    ,
    T iO Cl 2
    ,
    AlCl 3 are adsorbed from the oxidation process.
    and other impurities, after mixing with organic paint, will lead to the paint polymer part of the production of colored substances, resulting in a decrease in whiteness, while the coated substrate will also produce corrosion, and through surface treatment can remove impurities, which is not surface treatment of titanium dioxide coarse can not be used directly one of the reasons.surface treatment of titanium dioxide pigments can be divided into inorganic surface treatment and organic surface treatment according to the properties of
    ;
    according to the surface treatment process can be divided into wet and dry two types. General inorganic surface treatment using wet method, organic surface treatment is mostly dry method.inorganic surface treatment is done by precipitation and adsorption, coating the surface of titanium dioxide particles with one or more layers of inorganic hydrated oxides, commonly referred to as 'envelopes'. Through the coating film can block the lattice defects, masking the photo-active point of its surface, so that titanium dioxide does not directly contact with organic matter in the dispersed medium, play the role of shielding photo catalysis, but also enhance the ability of titanium dioxide to withstand chemical erosion.function of inorderable surface treatment is to improve its weather resistance and chemical stability.And organic surface treatment is by organic surfactant polar group adsorption or bonding to the particle surface of titanium dioxide, relying on electrodescing force and spatial resistance effect to improve the wetting, dispersion and fluidization of titanium dioxide in a variety of dispersed media.but the effects of the two on titanium dioxide pigments are interrelated, and the common effect of inorganic and organic surface treatment has been proved to be better.of ink color is an importantand abstract work before printing. Simple color material three primary colors, yellow, lipstick, green adjustable with red, orange, yellow, green, blue, purple and other dozens of colors.in the actual deployment process, only three primary color ink can not obtain the color. This is due to the ink manufacturers selected pigments, dyes simply can not meet the international standard three primary color saturation, color concentration, brightness, etc. , the third-class raw color ink can only be added to tea gray, not black. Therefore, in the actual coloring process can not be separated from black ink, white ink, lighteners and other inks and additives.ink adjustment process:1
    , master the ink used system, color, color saturation, viscosity, fineness and other indicators.2
    , the sample and customer requirements, process requirements, hue requirements, ink use requirements for the review, the arrangement of color group color order, product printing, ink dosage, the main tone of the deployment of in-depth understanding.3
    , thinners and ink resin solubility, temperature deviation and thinner ratio is related, if the temperature is high, thinners should be slow-drying type. At the same time, the dissolving effect and volatilization speed also play a very important role in the printing quality of the product, so the appropriate thinner should be selected according to the relevant conditions.4
    , before printing to do a good job of ink, thinner preparation.5
    , in the short time of power-on overprinting, according to the color matching, the appropriate use of raw ink, and grasp the proportion, according to the sample of each color group ink color matching, so that the printing speed is stable, a little adjustment can achieve the sample effect. In normal printing, batch control color is the same, for ink-tuning personnel more difficult, such as the amount of thinner addition will affect the color effect to varying degrees, which requires ink-tuning personnel to have a strong responsibility.
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