What is the relationship between ink and varnish?

   Printing and packaging materials cannot lack ink, and ink can be used to

print patterns and characters on the substrate. The ink includes main components

and auxiliary components, which are uniformly mixed and rolled repeatedly to

form a viscous colloidal fluid. It is composed of pigments, linking materials and

additives. It is used for various printing of books, periodicals, packaging and

decoration, architectural decoration, etc. With the increase of social demand,

the variety and output of ink have also expanded and increased accordingly.

   For operators in the printing industry, if the ink has good printability, it can be

put into use as soon as the can lid is opened, which is of course the most convenient

and trouble-free. However, due to the inherent viscosity of the ink when the ink is

manufactured, this viscosity cannot adapt to the needs of different environmental

conditions for different products. In the process of using the ink, it is often necessary

to adjust the ink according to the characteristics of the printed piece, the actual

situation of the working environment, and the production process. Printability

to make necessary adjustments.

   Ink viscosity is closely related to the printability of the ink. Appropriate ink viscosity is

the prerequisite for ink to have good printability. Ink viscosity is an inherent property of

the ink itself, which has a decisive impact on the printability of the ink. When the ink is

used on the machine, its viscosity often needs to be adjusted according to

the actual situation. Appropriate adjustments.

   In daily printing, increasing or decreasing ink viscosity is a frequent operation.

Varnish is an indispensable auxiliary material in the use of offset printing inks.

Commonly used varnishes are refined and blended with synthetic resins,

dry vegetable oils, and high-boiling kerosene. They are mainly used to adjust

the fluidity of inks. to reduce the viscosity of the ink, the dosage is generally about 3~5%.

The addition of varnish does not affect the gloss and adhesion fastness of the ink,

and has little effect on the dryness of the ink.