Printing ink classification

According to the color base classification, it can be divided into:

Dye-type inks, that is, dye-based inks, are also the inks used in most current inkjet printers.

Pigment ink ----- ink based on pigments.
According to the solvent, it is divided into:

Water-based inks - water and water-soluble solvents as the main component of the dissolved color base.
Oil-based inks - water-insoluble solvents as the main component of the dissolved color base.

The above concepts are applied to each other during actual use. For example, some pigment inks may be water-based inks or oil-based inks. However, water-based inks and oil-based inks are absolutely not allowed to be mixed in the same printhead in terms of their nature and the actual requirements of the printer.

The shelf life of ink is generally two years, and the preservation of ink requires sealing (this is the reason why AJ ink adopts internal sealing and external plastic box sealing double seal), avoid direct sunlight, the temperature should not be too high or too low (normal room temperature Can).

Second, ink affects the printing effect and print head performance factors

The quality of the ink used by a typical printer is determined by the following factors:
☆ viscosity and surface tension: viscosity is the resistance of the liquid flow, the surface tension of the liquid is related to the formation of droplets, one

In general, inkjet inks have a low viscosity, high surface tension to ensure good flow properties and droplet morphology. The viscosity of the blue-colored ink is: 1.0-4.0 cps (lime); 26.0-36.0 dynes/cm2 (dyne/cm2)

☆ PH value is the concept of liquid pH, the more acidic the solution, the lower the PH value. On the other hand, the more alkali the solution, the higher the PH value.

In order to prevent the ink from corroding the nozzle, the pH should generally be between 7-12. The pH of the blue-colored ink is generally between 7.0 and 8.0, which is basically close to neutral.

☆ Conductivity: In ink, the conductivity value is a parameter used to measure the amount of metal ions in units of Siemens/cm. The blue color ink is 2-6.5, and the e-generation ink is 2-7.

☆ Dispersant: It is a kind of surfactant. Its function is mainly to improve the physical properties of the ink surface and enhance the affinity and wettability of ink and sponge. Therefore, the ink stored and transferred through the sponge generally contains a dispersant.

From: China printing supplies network Author: PRINT-base