Printing Inks

Printing inks are finely dispersed, liquid to pasty mixtures which are made up of colorants such as pigments, binders (oil-varnish) and additives such as thinners, wax dispersions, etc.

Printing inks are used in printing machines to print a wide variety of materials such as paperboard, paper, foil, plastic, metal, leather, etc.
The shape of these materials may be flat, cylindrical…. The composition of the printing inks depends on the printing method and the substrate to be printed.

Rotogravure Inks

Rotogravure is a printing method in which the image to be printed is engraved onto a cylinder, forming depressions. During printing, these depressions, also called cups, are filled with soft, paste-like, low-viscosity inks, which are transferred to the print material by contact pressure.

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Sheet-fed (also referred to as sheet offset printing) is an offset printing method in which the material being printed is fed sheetwise into the printing machine.

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Cold-set inks are paste-like offset printing inks. They are used in web-fed offset printing.

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Heat-set printing inks are used in web-fed offset printing. They dry through evaporation of their mineral oil content in drying furnaces. This is accomplished with hot air at temperatures from 120 to 150°C.

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Flexo Printing Inks

Flexo printing, like letterpress printing, is one of the relief printing processes and is used for printing newspapers, books and packaging, particularly for high-quality food packaging.

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Screen Printing Inks

In screen printing, the printing plate consists of a woven mesh with a print template. The screen printing ink is transferred through the printing plate onto the print substrate.

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