What kinds of printed pigments
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White pigment
Titanium white
(1) a white
The chemical name of Sycamore is oxidized Qin f, also known as soft white powder. Its a color white,
Grainy, soft, strong hiding power, is the best kind of white pigment.
The white pigment can be weighed against sunlight and can remain unchanged for a long time. It is insoluble in dilute acid, heat-resistant, and
Strong hiding power of 45-.75 g/m. Oil absorption is intestinal N4S, this is heavy
4, the particle is in the range of 0.1-0.7 microns. Due to the large dispersion, the coloring power is also higher
Strong.
The number of white pigments is non-toxic, and the number of contained oxygen dioxide is an inert substance, so its performance
Very good, can be mixed with any quick orange, because it has a strong color
Force, so you can add a lot of fillers, such as sulfuric acid grade and calcium sulfate, can lower Yan'a
The cost of the material. two','
High-quality soft white pigments containing 98^99 of the most soft dioxide, made with its.
The performance of the white ink is extremely qualified and can withstand high heat, so it is used for white iron. But white
Those with poor pink quality, which contain a large amount of barium sulphate and sulphuric acid 95, are made into ink.
The disadvantage of yellowing.
C-white (with or without chewing) and Tielan or organic pigments
When it is mixed, the ink will cause discoloration or ancestral color under the effect of light.
Use alone.
Zinc white
(2) White speech
The term white, also known as zinc oxide, oxygen powder, Asian ship China and so on. Is commonly used in printing inks
White quite material.
White non-toxic insoluble in water, pumping and drunk, able to resist weak base, but not acid. a bit large
Small 0.150.7 micron, specific gravity 5.8, an oil absorption of 18, hiding power
100- 11o g/m2, coloring power is poor, fresh white turns yellow when heated, and cold
However, it is reappearing white and has no receptivity to hydrogen sulfide. Zinc white and yellow or
The machine can be used as a catalyzer, so that the ink can be mixed under the effect of light.
Easily induced t-stack failure.
If a white ink is made from a material with a too high acid value, Rikuro can easily cause gelation.
Hard, therefore, must choose to use low speed acid material. Words can be used alone,
It can also be used in conjunction with other white pigments. It is the most used in the manufacture of white ink.
(3) Lithium white
绊 Group white fork name Lide powder, is a mixture of sulfuric acid and sulfuric acid grade, the proportion of
4.3, particle size is 2 ~ know, oil absorption is 1220, hiding power is stronger than speech white)
However, it is lower than Syria. High quality white tiger leopard contains 30 community vulcanization and platinum
Hu, if the composition contains more barium sulphide, its hiding power is stronger.
绊朔 White is resistant to demineralization. It is easily decomposed in acid and releases Hs. It is made of it.
The ink-drawing stability is extremely poor, and it suffers from the shortcomings of light a and atmospheric yellowing.
Although it has been improved to be very lightfast, due to its coarser particles, the plate surface has been sharpened.
It is used less in the ink and is also used in conjunction with other white F materials. .
Others include sulphide, white and white. , Because Tuen in has more in nature
Disadvantages, or sources of supply and price, and so on, and therefore inconvenient to use in ink manufacturing.