Ink is a uniform mixture composed of colored bodies (such as pigments, dyes, etc.), binders, fillers, additives and other substances. It can be printed and dried on the printed object. It has a color and a certain fluidity.
The oil content is a stable, coarsely dispersed system composed of the colorant as the dispersed phase and the binder as the continuous phase.
1. Characteristics and functions of colorants
(1) Colorants are solid powdery granular substances with a certain color;
(2) Pigments: ① Insoluble in water, oil or organic solvents; ② Pigments only color the surface of objects;
(3) Dye: It can color all objects and is generally soluble in water.
2. Characteristics and functions of connecting materials
(1) Viscous fluid is the liquid part of the ink;
(2) Act as a carrier for colorants to evenly disperse and mix the colorant particles together;
(3) It can make the particles pass through and firmly adhere to the surface of the substrate, so that the ink has printing properties such as glossiness and dryness;
(4) The quality directly affects the performance of the ink.
3. Characteristics and functions of fillers (not much dosage)
(1) Transparent, translucent or opaque white powdery substance;
(2) Mainly used to reduce the amount of pigment and reduce the cost of ink;
(3) The color of the ink can be adjusted to improve the printability of the ink.
4. Characteristics and functions of additives (<10%)
Improve the printability of the ink - if you increase the fluidity of the ink and reduce its viscosity, etc.