Classification of ink Modern inks are mainly divided into four categories according to the version:

① Letterpress ink

A type of ink used to print books, newspapers, picture albums, documents, account books, etc. The main feature of letterpress printing is that the inked part of the printing plate protrudes from the non-inked part. Letterpress inks are divided into lead printing inks, copperplate inks, letterpress rotary inks, and flexographic letterpress inks according to the type of printing machine and the use of printed products.

② Lithographic ink

A class of inks suitable for lithographic printing. Each part of the lithographic layout is basically in a plane, the pattern is lipophilic, and the non-pattern is hydrophilic, and the principle of oil and water repulsion is used for printing, so the lithographic ink needs to have water resistance. According to the process, it is divided into offset printing ink, web offset printing ink, flat offset printing ink, waterless offset printing ink, iron printing ink, lithographic ink, and Ke? plate ink.

③ Gravure ink

A class of inks suitable for gravure printing. When printing, the pattern part concave in the layout is inked, and the ink on the non-pattern part is wiped off or scraped off, and then the printing is carried out. There are engraving gravure inks and photogravure inks.

④Mesh printing ink

A type of ink that leaks through the mesh of the printing plate to the printing surface for printing. Mesh printing ink is divided into transcription ink and screen printing ink.

Water-soluble resin Water-soluble resin or water-dispersible resin is the binder of water-based ink, which has a great influence on the viscosity, adhesion, gloss, drying and printing adaptability of the ink. Water-based ink is a water-based printing ink prepared by chemical process and physical mixing of water-based polymer emulsion, organic pigment, resin, surfactant and related additives. Because it replaces traditional ink with water, it accounts for 30%~70%. No volatile organic solvents are contained in the ink, so there is no adverse effect on the health of workers and no pollution to the atmospheric environment during the printing process. It also eliminates the hidden dangers of flammability and explosion in the workplace, and improves the efficiency of the printing process. security. At the same time, in comparison, the cost of using water-based inks is about 30% less than that of solvent-based inks. This unique advantage of ink is in line with increasingly stringent environmental regulations, and is increasingly favored by the packaging and printing industry around the world, and has gradually expanded rapidly to the newspaper printing industry.

The above is the classification of inks. If you want to know more about water-based inks, please consult Moorjia New Material Technology Co., Ltd.

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