The inks are varied in terms of material selection, formulation design and scope of use, and variety of hue, but the specific printing failures are indeed similar. In order to facilitate the normal use of ink, we now reply to questions raised by many companies recently. How to deal with pitting after printing? When printing on aluminum-plated film or registering on white ink graphics, the cohesion of the foam in the ink or the resin binder in the ink system is too large, resulting in pinhole (blank spots). General processing methods: one is to increase the amount of ink coating; the second is to add a desalting agent to the ink; the third is to add a defoaming agent; the fourth is to add a thickening and thickening agent; the fifth is (gravure printing) upward Move a little; six is ​​to add a stirrer in the ink fountain; seven is to reprint once; eight is to use a resin with a small cohesion as the ink binder; nine is to use a good leveling, antistatic ink or slow down the printing speed, and strive To achieve the purpose of eliminating pitting, pinholes, spots, white spots. What resin is used as the binder for the water-based high temperature resistant artificial leather printing ink? According to the author's experience, the domestic PDL-1 resin that can meet the technical requirements of similar inks in the United States (heat-resistant 150 ° C, water-resistant washing for 30 minutes) is both soft and resistant to high temperatures and water rubs. Can varnish be used to prepare printing inks? As long as the varnish is added with color paste or colorant and then dispersed or ground, it is a printing ink variety. How is the "one ink multi-purpose" ink appearing on the market designed? The so-called "one-ink multi-use" is often because the product's ingredient system contains a solvent that can dissolve polar substrates and non-polar substrates, plus the amphoteric resin as a linking material for packaging printing ink systems Introduced, it can reach a variety of applications. After the author changed the solvent in the ink system to a different mixture of DMF and MET, the manufactured ink can be called water-soluble ink or non-toxic solvent ink, which can produce rotogravure or Flexible relief printing ink can also be used as manual or mechanical screen printing ink after adding thickening aids. It can print both polar paper and non-polar plastic products ... even simply using tap water, industrial ethanol or diesel to adjust the viscosity and drying speed of the ink. What is the appropriate ratio of the coloring material for printing gold and silver? In the process of packaging printing, when quickly preparing gold or silver ink, the ratio of gold powder (silver powder) to ink is generally controlled at 17% to 25%. Of course, this is just a general concept. Specific to a colored gold or silver powder, its share should be determined depending on its specific surface area.
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Several problems in exploring the suitability of ink