Clever use of ink additives easy printing trouble less

Ink auxiliaries are auxiliary materials used to adjust ink to adapt to different printing conditions. There are many kinds of ink additives, commonly used to remove adhesive, diluent, desiccant, slow drying agent, diluent, friction resistance agent, coating oil, anti-rubbing agent, toning oil, etc., the following simple introduction to the role of common ink additives and their use.

1 adhesive

Adhesives have very little viscosity and are commonly used in lithography and flash printing inks to reduce their viscosity. In offset printing, due to the change of paper performance and printing conditions, such as oil absorption, poor surface strength, positive and negative coating phenomenon, when excessive desiccant or printing workshop room temperature is too low, will cause paper hair, printing heap version, paste version and other faults, affecting the quality of the print. Therefore, when the above phenomenon occurs, you can add an appropriate amount of adhesive, can play a role in weakening and eliminating the above fault.

2 removal agent

Diluent, also known as diluent, is a large amount of offset printing auxiliaries. There are two common diluents: one is transparent oil, used for light ink; One is resin - type diluent, used for resin inks. If the ink color is too deep to restore the original manuscript in printing, you can add an appropriate amount of light agent to achieve the desired effect.

3 desiccant

Desiccant is one of the most important printing ink additives. According to the printing conditions and different printing paper, the amount of desiccant, types and use methods are also different. The commonly used desiccant is red dryness oil and white dryness oil. Red dryness oil is dry from outside to inside, and white dryness oil is dry at the same time. When printing, I choose the type of drying oil according to the requirements of printing drying and ink color. Generally, the amount of dry oil is 2%-3%, too much will be suitable for the base, so that the drying speed decreases.

4 slow drying agent

Anti-desiccant is also called antioxidant, which is a kind of ink auxilaries relative to desiccant. In the printing process, due to a variety of reasons often cause downtime, when downtime is longer, the ink will dry peeling. In order to solve this kind of problem, often add the right amount of desiccant to the ink on the machine, and run the machine a few times, so that the drying is not too fast.

5 thinner

In the printing of ink viscosity is too large or paper quality is poor, often produce paper flapping, plate failure, affecting the normal printing, at this time, in addition to adding an appropriate amount of adhesive to reduce ink viscosity, can also add a small amount of thinner to reduce ink viscosity, so that the printing smoothly. There are more types of diluents, generally no. 6 inking oil with low viscosity.

6 friction resistant agent

Friction resistance agent is also called smoothing agent, this kind of material is mainly based on wax material, in the printing ink particle is coarse, such as white ink, gold and silver ink, add the right amount of friction resistance, increase the friction resistance and smoothness of printed matter.

7 hood light oil

Trademarks, albums and other high-end printing, printing surface is mostly after gloss treatment, in order to achieve high gloss effect, the use of gloss oil, before printing will be mixed in the ink, can also be printed after printing a gloss oil. However, the printing processed by the cover, after a long time will yellowing, poor light resistance. Therefore, there are many new light oil instead of the cover oil has been applied.

In addition to the above several commonly used ink additives, there are anti-rubbing agent, anti-foam agent, gold printing oil, etc., here is no longer described, as long as the use of strictly in accordance with the requirements of the operation can be.