Printing ink is an important part of the printing process. Do you know the composition of printing ink?
The composition of printing ink includes: PVC, pigments, additives.
1. The binder is a kind of adhesive, which is used as the carrier of the pigment to make it easier for the pigment to attach to the surface of the textile. Its functions are: 1. Give the ink a certain viscosity, fluidity and thixotropy. 2. Affect the drying speed of ink. 3. Determine the abrasion resistance and gloss of the ink.
2. The main function of pigments is coloring, which requires high tinting strength, hiding power, chemical stability, light resistance, and easy dispersion. Hue is the most intuitive indicator, reflecting the quality of the product, so the quality of the pigment is very important. Its functions are: 1. Give color and determine concentration. 2. Endow the ink with strong durability.
3. Additives can impart certain properties to the ink: plasticizers can increase the plasticity of polymers and make the ink film soft; diluents can thin the ink, increase leveling, and reduce viscosity; desiccants increase drying speed ;Surfactants can improve the dispersion of solid components, prevent coagulation and precipitation...
The role of carbon black in printing inks:
Pigment carbon black is one of the main pigments of ink, which mainly plays a coloring role and affects the quality of ink and printed matter. The requirements of printing inks for carbon black are mainly blackness, hue, flow phase, viscosity, dryness and thixotropy. When the particle size is small and the structure is low, the blackness and tinting strength are high, and the gloss is good.