Ink is an important material for printing, it is printed or inkjet pattern, text on the substrate. The ink consists of a main component and an auxiliary component, which are uniformly mixed and rolled repeatedly to form a viscous gelatinous fluid. It is composed of binder (resin), pigment, filler, auxiliary agent and solvent. Used for books, packaging and decoration, architectural decoration and electronic circuit plate printing. With the increase of social demand, ink varieties and production have also expanded and increased accordingly.

China produced ink very early. The predecessor of ink is loose ink. In China, black ink is made from pine smoke, gum (mainly cow skin glue, which acts as a bond for soot) and water. It was first used for writing and later for block printing. Ink in China's early development of rapid, after the Middle Ages, has been complacent, meet the traditional secret recipe, not very creative. At that time, European wood printing was also based on water, but the application was poor, so it was changed to oil. Later evolved into modern printing ink. The development of printing technology stimulates the development of the ink industry, and there are inks that adapt to various printing requirements, with many functions and high quality.

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