Waterborne gravure printing ink features

2022-07-22

The difference between water-based gravure printing ink and other printing methods mainly lies in: its printing plate through corrosion or engraving, the formation of a lot of plate surface of different volumes of concave hole, known as the ink hole.The ink hole volume is large, the amount of ink filling in the printing process is large, and the ink layer thickness is transferred to the substrate. The ink hole volume is small, the amount of ink filled in is small, and the ink layer transferred to the substrate is thin, so the orderly and bright and bright picture and text formed on the substrate.In gravure printing, the smooth surface of the non-graphic part that is in contact with the substrate is pressed, and the ink is basically not pressed. The biggest characteristic of gravure printing is that the ink film of the printing product is nearly twice as thick as that of letterpress printing, so the ink layer is full and three-dimensional, but it is prone to sticky failure.

Water-based gravure printing ink is characterized by: part of the plate cylinder impregnated rotation in the ink tank, making the entire plate surface is covered with ink, when all the plate with the scraping blade after inking scrape off the plate blank part of the ink, at the same time fully will ink into plate in the recess, and the plate by stamping device within the recesses of ink stamping on the surface of substrates, to complete the transfer of ink to the substrates.Some gravure rotary presses are also installed with a heating and drying device to speed up the drying and curing speed of ink on substrate materials (especially non-absorbent materials).

The advantage of water-based gravure printing ink is very outstanding, the printing quality of stereoscopic effect A clear hierarchy Bright color is full Accurate color reproduction, and printing process is relatively simple, lower rejection rate, plate printing endurance than lithographic printing plate printing endurance high, in the field of flexible packaging printing, particularly for food packaging), gravure printing by the people of all ages.

Water-based gravure printing inks mostly belong to volatile drying ink, the binder is composed of resin and a large number of volatile solvents, viscosity is very low, the pigment and filler additives and the binder mixture and grinding dispersion into ink.Ink is printed to the substrate, through the solvent quickly volatilized and dry conjunctiva in a gravure printing machine with heating device, the solvent in the ink to accelerate volatilization, drying faster, so can be non-absorbent materials (plastic film, metal foil, etc.) printing.

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