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Organic Pigment For Printing Ink By The Chromosome

Hangzhou Fancheng Chemical Co.,Ltd | Updated: Oct 17, 2017

Organic Pigment For Printing Ink By the chromosome

Environmental awareness, some harmful paint or paint or ink are gradually being eliminated by the market, environmentally friendly organic pigments, inks and other markets recognized, and even our plastic gravure ink also began to turn to environmental protection.

Ink is a homogeneous mixture of substances such as chromosomes (such as pigments, dyes, etc.), linkers, fill materials, and other materials. Addition of resin to the ink increases its fastness, fast drying, Bright color, glossy excellent. For environmental protection, the resin added to the inside is also replaced by polyamide pure resin.

So we see a lot of business opportunities in the manufacturers are to environmental protection in transition. First, oily ink

In the current food plastic packaging printing, such as instant noodles, food bags, supermarket shopping bags, benzene-soluble chlorinated polypropylene ink the most widely used. This kind of ink manufacturing and use of technology are mature, mainly used in BOPP (biaxially oriented polypropylene) materials in India, and the use of gravure printing method, which is technically very mature and foreign countries are widely used in the printing technology , Although the printing of this ink is excellent, postpress processing performance is good, dry fast, but there are still many defects.

1, the residual solvent value of the printed matter is high.

2, in the production and storage process, easy to release chlorine and the formation of hydrogen chloride, the ink was strong acidity, the printing plate production of heavy corrosion.

3, benzene-soluble ink can destroy the ozone layer, the use of the process will also harm the health and safety of workers, and residues in the packaging products in the residue, under certain conditions will cause a certain degree of pollution in the packaging of food.

Second, water-based ink

Water-based ink is currently the vast majority of domestic and foreign flexographic printing and printing used by the ink, which is mainly by the water-soluble resin, organic pigments, solvents and related additives by the combination of grinding processing. Water-soluble resin is a linker of water-based ink. Domestic water-soluble acrylic acid modified resin is often used as a linker, and its heat resistance, weatherability, chemical resistance, stain resistance and gloss have significant advantages, Dissolved or synthetic polymer emulsion, have shown excellent performance, water-based ink does not contain volatile organic solvents, not only can reduce the residual toxicity of printed matter, but also to prevent electrostatic contact with flammable solvents and fire. Water-based ink is not only a new type of "green" printing ink, but also the best alternative to benzene-soluble ink products.

 Water-based ink and other printing using the same ink, but also by the pigment, ink additives, made of a combination of materials. But one thing to remind you is that the production of water-based ink must pay attention to organic pigments of alkali resistance, relative density and pigment mix. Sometimes organic pigments can be made into granular water dispersions, that is, a few pigment paste, and then mixed with the binder and additives to produce water-based ink dispersion. Here, Xiaobian give everyone focus on speaking about the production of water-based ink, the choice of organic pigments a few points of attention, it can be said to be a small skill:

(A) the relative density of the pigment

When the relative densities of the water-based colorants are different from each other, the organic pigments having a relatively small density are easily floated on, for example, dark green water is often colored with carbon black, phthalocyanine blue lead chrome yellow and the like, The relative density of the pigment is too large, it is easy to precipitate agglomeration and damage the stability of water-based ink, such as iron red, chrome yellow, etc., often due to agglomeration can not stir.