The best silk screen printing ink performance comp

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Complete understanding of silk screen printing ink performance

7 Fineness

fineness refers to the size of pigment and other solid raw material particles in the ink and the uniformity of these particles in the binder. Use a fineness meter to scrape the properly thinned ink from the deepest part of the meter groove in the actual production to the flat place, and immediately tilt the light for 15 seconds. At least 15 particles in the ink are within a certain scale range, and the value is the fineness of the ink

the fineness of screen printing ink is generally between 15 ~ 45 microns. If the fineness is too thick, there will be a paste in the printing process, and the pattern will not be printed. If the silk is thick, the fineness can also be thickened accordingly. Generally, the coarsest particles shall be less than a quarter of the pore area

the fineness of ink is different from that of solid powder. The latter refers to the basic particle size of powder, which is very small. See table 3-12. The basic particle size of common pigments is less than l μ m. In fact, pigments are agglomerated with several basic particles (up to 50 μ m) After grinding, the aggregates added to the ink binder are dispersed. The better the dispersion, the smaller the ink particles (fineness). General ink fineness is 5 μ M, and the ultra-fine can reach 1 ~ 2 μ m。 Fineness will affect the gloss of the ink film and the ink flow table 3-12 particle size of several types of pigments

pigment name particle size( μ M except for this kind of wood plastic composites made from agricultural and forestry wastes)

general pigments <0.1

titanium dioxide 0.25

carbon black 0.0 carbon fiber composites used in vehicle body and chassis can reduce the weight of the whole vehicle by 40% ~ 60% 1 ~ 0.1

fluorescent pigments 1.2 ~ 50.0

gold and silver powder thickness: 0.1 ~ bolt tray shear strength testing equipment 2.0

diameter: 1 ~ 200

color foil pigments> 200

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