Introduction to printing inks, what components printing inks are made of

Ink is an important material used for printing, which expresses patterns and words on substrates through printing or spraying. The ink consists of a primary and auxiliary component, which are homogeneously mixed and repeatedly rolled to form a viscous gelatinous fluid. It is composed of binders (resins), pigments, fillers, additives and solvents.

It is used for various printing of books, packaging and decoration, architectural decoration and electronic circuit boards. With the increase of social demand, the variety and output of inks have also expanded and increased accordingly.

Ink is a homogeneous mixture composed of colored bodies (such as pigments, dyes, etc.), binders, fillers (fillers), additives and other substances; Able to print and dry on the printed body; It is a slurry adhesive with color and a certain degree of fluidity. Therefore, color (hue), body bone (rheological properties such as thinness and fluidity) and drying properties are the three most important properties of inks. There are many types of them, and their physical properties are also different, some are very thick and sticky; And some are quite thin.

Some use vegetable oil as the binding material; Some use resin, solvent or water as binders. These are determined according to the object of printing, i.e., the substrate, the printing method, the type of printing plate and the drying method.

The main components of printing inks:

Main agent: pigments: organic pigments, lake pigments: inorganic pigments.

Connecting material: oil-type connecting material, resin type connecting material.

Organic solvents: additives, flow modifiers, viscosity modifiers, adhesion modifiers, anti-dirt agents, desiccation, conditioners, desiccation inhibitors, tone modifiers, dilution agents, color enhancement agents.

Pigment is a solid component in ink, which is the chromogenic substance of ink, and is not allowed to be water-neutral pigment. The saturation, tinting strength, transparency and other properties of the ink color are closely related to the performance of the pigment.

The binder is the liquid component of the ink, and the pigment is the carrier. In the printing process, the binder carries pigment particles, and the ink half of the printing machine is transferred to the substrate through the ink roller, the printing plate, and only permeates to form an ink film, which is fixed, dried, and adhered to the substrate. The gloss, dryness, mechanical strength and other properties of the ink film are related to the properties of the binder.

Additives added to the ink to improve the printability of the ink, such as: viscosity index, adhesion, dryness, etc.

The configuration process of ink is more complicated, the pigment, binder and additives are mixed into an oily paste in the ink mixer according to the proportion, and repeatedly rolled in the roller grinder to make the pigment evenly dispersed in the binder with fine particles.

1.What is ink?

Printed materials composed of pigments, binders, fillers, additives, etc.

2.What is the classification of inks?

1) According to the printing method.

According to the layout, it is divided into: letterpress, lithograph, gravure, photogravure, screen and other inks;

According to the printing method, it is divided into: offset printing, direct printing and other inks.

2) According to the substrate of the substrate.

According to the substrate, it is divided into: inks for paper, metal, plastics, fabrics, etc.

3) According to the dry form.

According to the drying mechanism, it is divided into: permeation drying type, oxidation polymerization type, volatile drying type, light hardening type, thermosetting type, cooling curing type and other inks;

According to the drying method, it is divided into: natural drying type, hot air drying type, infrared drying type, ultraviolet drying type, cooling drying type and so on.

4) According to the characteristics of the ink.

According to the color: yellow, red, blue, white, black, gold, silver, gold powder, fluorescent, pearlescent, etc.;

According to the function, it is divided into: magnetic ink, anti-counterfeiting ink, edible ink, foaming ink, aromatic ink, recording ink, etc.;

According to the resistance, there are: light resistance, heat resistance, solvent resistance, abrasion resistance, alcohol resistance, chemical resistance and other inks.

5) According to the composition of the ink.

According to the raw materials, there are: dry oil type, resin oil type, organic solvent type, water-based type, paraffin type, ethylene glycol type and other inks;

According to the form, it is divided into: gelatinous, liquid, and powdery inks.

According to the use, it is divided into: news ink, book ink, packaging ink, building materials ink, trademark ink, etc.

3.How do I use the ink?

In order to adapt to the printing of high-quality paper at high speed, the penetration drying type or oxidation conjunctival drying type can no longer meet the requirements, and it is easy to produce poor dryness, poor adhesion, pulverization, rubbing, etc., in order to overcome these drawbacks, the use of thermosetting ink, that is, in printing, after 200 250 high temperature baking, the solution in the ink escapes, so that the ink is fixed on the printed matter.

There are two main types of ink properties: solvent-based inks and water-based inks, one is insoluble in water and the other is soluble in water.

Printing methods are divided into: flat ink, gravure ink, letterpress ink, orifice plate ink, special ink.

Ink Effect: Ordinary Ink, Fluorescent Ink, Color Changing Ink, Mirror Ink, Fragrance Ink, Scratch Card Ink, Laser Ink, Magnetic Ink, Anti-counterfeiting Ink.

Ink drying method: hot drying ink, UV drying ink, EB drying ink and so on.

The composition of the binder can be divided into oxidized condensation film drying resin materials, volatile drying solvent inks, two-component reactive inks and ultraviolet curing inks.

Printing material classification: paper ink, plastic ink, printing iron ink, glass ink, ceramic ink, ......Wait.