Offset ink preparation and printing points (on)

With the progress of our country's printing industry, the development momentum of China's ink manufacturing industry is very rapid. By 2003, the national ink production capacity had reached 250,000 tons, ranking fourth in the world. The quality and technical indicators of major domestic ink manufacturing companies have reached or approached the advanced level of similar foreign products. In addition to basically satisfying the needs of the domestic printing industry and the packaging and decorating industry, they have also been exported to more than 50 countries and regions in the world and achieved export earnings. . However, we must realize that compared with the international advanced level, China's ink manufacturing industry still has a certain gap, mainly in the production process and the level of tooling lag, the poor consistency of the quality of domestic raw materials, scientific research and development capabilities and analytical methods need to be further improved. Poor environmental awareness. The key targets for the development of the ink industry in the future are commercial web offset inks, high-grade offset inks, environmentally friendly inks, and special inks. Offset pearlescent ink is one of the special inks. This article will discuss with you the composition, characteristics and application of offset pearl ink.

Offset pearl ink composition

Offset pearlescent ink is a part of the lithographic special ink. Its print has delicate pearlescent luster and strong light refractive index, which can improve the grade of printed matter. It is mainly used for printing high-end packaging, trademarks and pictures.

Offset pearlescent ink consists of pearlescent pigments, binders, fillers, additives, etc., and has a certain degree of fluidity of the paste adhesive, after mixing and mixing evenly, it can show soft pearlescent effect after drying on the substrate.

Pearlescent pigment

Pearlescent pigment is a new type of pigment that is neither soluble in water nor soluble in linking materials. This pigment can reproduce pearl luster possessed by pearls and shells. As early as the 17th century, pearlescent pigments began to be produced on the European continent. At present, the most common pearlescent pigments are composed of anatase or rutile titanium dioxide coated mica flakes, which can exhibit a variety of delicate, soft silvery white luster. This elegant and generous The color is more and more loved and accepted by people.

2. Binder

The binder is an adhesive fluid. As its name suggests, it acts as a link. It is a mixture of powdered pearlescent pigments and other substances that are mixed together to form a paste with a certain degree of fluidity. The binder is the main flow part of the ink and is the heart of the ink.

3. Filler

The filler is a white transparent, translucent or opaque powdery substance. It is also a solid part of the ink and plays a major role in the filling of the ink.

4. Additives

An additive is an additional part of the ink except for the main part, which plays a role in adjusting the performance of a certain aspect of the ink, mainly depending on the product characteristics and requirements.

Preparation of offset pearlescent ink

1. Offset pearl ink basic formula

The basic formula of offset pearlescent ink is as follows.
Pearlescent pigment: 20% to 50%
Material: 30%～70%
Filler: 10%～20%
Auxiliaries: 1% to 10%

2. Production process

It should be particularly pointed out that due to the special nature of pearlescent pigments, it is not allowed to grind like ordinary inks during the dispersion process, otherwise the structure of pearlescent pigments will be destroyed, and the gloss and pearlescent effect of printed products will be affected.

3. The main technical parameters

Fluidity: 32～42mm
Stickiness: 6-10
Pearl effect: good

(to be continued)