The main component of printing ink

2022-05-12

Printing ink is a paste colloid evenly dispersed and mixed by materials such as colorants, connectors and fillers. Color material gives printing rich and colorful colors,Connecting material as the carrier of color, also as a binder to make the color fixed on the substrate surface; Fillers give the ink the appropriate properties, so that the ink to meet the printing process of printing suitability.Ink should have a certain fluidity, and meet the requirements of the nature of various printing processes, can be quickly dried on the printing, dried ink film should have the corresponding water resistance, acid resistance, alkali resistance, light resistance, abrasion resistance and other resistance.

1.Connecting material connecting material is a gluey fluid, its role is first as a carrier of pigment, powdered pigment and other solid particles mixed together; Secondly, as a binder, the pigment can be fixed on the substrate surface to achieve the purpose of displaying text, image, marking and decoration. Connecting material to a large extent determines the ink viscosity, viscosity, dryness and fluidity. In order to get high quality ink, we must use high quality connecting material. The main component of the connecting material is oil (vegetable oil mineral oil) resin solvent and auxiliary material composition.

2.Additives due to the change of printing conditions, at the same time, in order to make the printing workers can take the initiative to adapt to the changing printing conditions, the use of good ink, improve the quality of printing, in the ink to add several special performance of the ink additives is inevitable.Ink additives can improve some of the performance of ink, such as: plasticizer can increase the plastic polymer material, so that the ink film has better softness; Diluent can make the ink thin, increase the fluidity of the ink, while reducing the viscosity of the ink.Remove adhesive, also known as adhesive, it can reduce the viscosity of ink, while not affecting the ink body bone; Drying agent (desiccant) can accelerate the drying speed of ink; The purpose of diluent is to dilute the color of ink, also called diluent; The purpose of reverse gelling agent is to prevent ink gel thickening and agglomerating; Anti-drying agent (antioxidant) can delay the oxidative polymerization process of dry oil; Anti-stain agent (anti-stain agent) prevents ink from rubbing on the back of another print.Surfactants can improve the dispersion of solid components and prevent their agglutination and precipitation. Preservatives can prolong the storage time of water-based ink; Defoaming agent can eliminate ink bubbles generated in the process of use; Uv absorbers can improve the sun resistance of prints.

3.Pigments and dyes

The colored materials used in printing ink are usually pigments, but also some dyes. Pigments and dyes are very fine colored substances. Pigments are generally insoluble in water and insoluble in connecting materials. Most of them are called suspended state in solution. Dyes are generally soluble in the binder. Pigment must have a high tinting power, covering power, chemical stability, light resistance and other properties, at the same time, the dispersion ability in the connecting material should also be high. Printing ink commonly used for inorganic pigment filler organic dyes and dyes.

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