1. classification of inkjet ink:
A. according to the color base.
Dye-based ink (Dye): dye-based ink is used in most of the ink-jet inks on the market.
B. pigment ink (Pigment): pigments are used as the chromophore.
A. according to solvent:
a. water based ink: water and water-soluble solvents are the main components of the dissolving color base.
b. oily ink: non water and water-soluble solvents are used as the main components of the dissolving color base.
In practical applications, the above classifications are not strictly separated but intersect each other. For example, some pigment inkjet ink may be water-based, or oily, but from its own nature and the actual requirements of the printer, water and oiliness must not be allowed to mix in the same print head. Ink shelf life is generally 2 years, ink preservation requirements sealed, to avoid direct sunlight, temperature should not be too high or too low.
2. main parameters of ink
A. viscosity and surface tension: viscosity, resistance of liquid flow, and surface tension of liquids.
Generally speaking, inkjet ink requires low viscosity and high surface tension to ensure good fluidity and droplet shape.
B. PH value: The more acidic the solution is, the lower the PH value is. On the contrary, the stronger the alkalinity of the solution is, the higher the PH value is. In order to prevent ink from corroding the print head, the PH value is generally between 7-12, usually between 7-8, based on neutrality.
C. conductivity: in the ink, the conductivity value is the measure of the salt content.
Generally speaking, the salt content is not more than 0.5%, so as to avoid crystallization and electrochemical corrosion.
D. Wetting dispersant: is a kind of surface activity, its role is to improve the physical properties of the ink surface, enhance the affinity of ink and sponge, wettability, therefore, generally through sponge storage, conduction of ink contains dispersant.