Printing Ink Printing Common Failure Analysis--Ink Film Crystallization

The general performance is that it is difficult to print the second or third color ink after the previous ink is formed, and the surface thereof has been crystallized (ie, vitrified). This is mainly due to the difference in the properties of the two inks or their composition. , resolving (that is poor affinity) bad; second is to add too much silicone lubricant in the ink system, especially in hot weather operation; Third, the surface of the composite ink lacks the matt or anti-adhesive surface that can form a rough surface. The antistatic agent causes the surface to be too smooth. The fourth problem is that the printing plate hole (graphic pattern depth) is too shallow or the ink flow is too high or the viscosity is high.

Treatment method: In the ink system, increase the amount of true solvent to increase its re-dissolving affinity, replace the ink with the same color as the previous color (the same brand and manufacturer), and secondly, use the ink containing silicone lubricant as much as possible. In one color, the second or third ink is printed when it is slightly tacky. Add appropriate amount of matte powder (does not affect its surface gloss as standard) in compound ink or subtract anti-stick and anti-static dose, replace printing plate or re-manufacture the shade plate with depth of 25 ~ 45 μm, optional content High viscosity and low viscosity inks regularly eliminate plate ink knots.

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