Packaging Box Printing Process to Prevent Excessive Emulsification and Residue of Ink

Abstract

The invention discloses a packaging box printing technology for preventing ink over emulsification and residue generation. The packaging box printing technology comprises the steps that after a printcylinder of a printing machine is separated from paper, the surface of the print cylinder is blown through a first air supply device; the ink surface is blown through a second air supply device at a border just in contact with ink when the print cylinder of the printing machine dips ink; the ink surface is blown through a third air supply device at a part separated from ink after the print cylinder of the printing machine dips ink; and a plurality of rotors which can fill the inner bottom of an ink pond are put into the ink pond of the printing machine, and the rotors are driven to rotate through a magnetic stirrer at the bottom of the outer side of the ink pond. According to the packaging box printing technology, mixing of substances like fountain solutions during ink printing is effectively reduced during the printing stage, over emulsification and generation of large-particle substances which affect the printing effect in ink are prevented, printing quality can be guaranteed, printing efficiency is greatly improved, and residual ink after printing can be normally utilized in a relatively long time.

Description

technical field [0001] The invention belongs to the field of advanced manufacturing and automation of printing technology, and in particular relates to a packaging box printing process for preventing excessive ink emulsification and residue generation. Background technique [0002] The emulsification and residue of the ink have an important impact on the printing quality. [0003] In the printing industry, slight emulsification is inevitable and necessary for the smooth operation of offset printing, but excessive emulsification has a great impact on printing quality. On the premise that the surface of the printing plate is not dirty, the degree of emulsification of the ink must be reduced as much as possible . Excessive emulsification will reduce the quality of color reproduction and ink transparency. For color printing, it will affect the subtractive color mixing of the three primary color dots, so that the color cannot be restored correctly. Excessive emulsification is a ...

AI Technical Summary

Problems solved by technology

Only a small part of the anti-emulsifier added in this way is adsorbed on the surface of the pigment, and most of the additives are in a free state in the ink, which not only increases the amount of anti-emulsifier, but also affects the surface tension of the ink and printing suitability. In addition, this method can only reduce the emulsification value of the ink to about 60%, but for high-speed printing, the emulsification value of the ink often needs to be controlled below 40% or even lower

[0011] In addition, some inks, such as UV matte inks, have residues during printing, which is a headache for many printing manufacturers, because a large amount of residues not only greatly increases the cost of printing manufacturers, but also seriously affects production efficiency.

When formulating UV matte ink, the raw materials used must be carefully inspected, but even so, in actual production, due to the particles on the printing material, the change of ambient temperature, the combination of particles between different components, etc. will still cause ink Aggregation of Inner Particle Residues

Images