Screen printing machine: a variety of decorative texture under the screen printing printing method
Since the grind arenaceous, imitation metal etching ink after introduction, then in high-grade cigarette, wine packaging and printing a large number of use, then came the wrinkles, ice, refraction, corals, such as ink, by the vast number of high-grade packaging users.
Grinding, wrinkles.Ice, refraction and coral in packaging printing printing effect played a good decorative effect, collectively known as decorative texture, the ink used collectively known as decorative inks, the printing are collectively referred to as decorative printing.
Decorative texture screen printing method
Decorative printing inks are used in the UV printing ink, the first is due to the UV ink curing speed, good printing quality.Commonly used way of solvent-based inks even infrared drying, solidifying and slowly, water-based ink curing is, of course, more slowly, and it takes 3 ~ 5 seconds to UV ink can be cured or even less than 1 second.Secondly, grinding, refraction.Coral and other decorative texture must be instantaneous curing to get after printing, screen printing lines, ice and other decorative texture must be caused by UV irradiation curing surface uneven contraction, therefore can only use UV ink printing.
Screen printing decorative texture has some advantages such as simple equipment, less investment, fast horse.Plate making, screen printing decorative texture area are mostly blank (with the exception of refraction effect), and printing.Decorative ink can printing on substrates.Through a variety of screen printing inks for intrinsic characteristics of the texture.
Frosted glass printing is one of the most widely used in decorative printing, widely used in cigarettes, alcohol, cosmetics and health products, etc. Product packaging printing.Frosted glass screen printing ink formulation, in addition to general UV ink must be half a dimer, active diluents and light initiator, also contain a lot of granular materials, its size is 5 ~ 50 microns, content is 5% ~ 40%.When printing, pressure on ink scraper, make the ink through the screen mesh is transferred to substrates (usually gold and silver cardboard).
When printing ink to gold and silver cardboard, particulate matter also transferred to the gold and silver cardboard, due to the effect of surface tension, ink in the slurry will agglutinate to surface, these particles after UV light irradiation curing, has formed many of these particles as core and external packages have already large particles of cured resin, namely what we call grinding particles.Thus, grind arenaceous grain production and distribution is random.Affect the grinding particle size, color and distribution of many factors, in addition to ink formulations, mesh size, shape, scraper blade Angle, scraper, silk screen and substrates of spacing between the old and the new.Scraping speed and the size of the force, substrates such as performance of grinding particle formation has nine to shadow.
In addition, scraping like to filter, ink in the ink resin and fine particles more easily through the mesh, and coarse particle is more accumulated in the residual ink, so after every scraper shaved, the composition of the ink will change, printed by the frosted texture will change too.Due to the above factors shadow to the mouth, even in the same print, almost overed have differences.This determines the frosted effect only decorative function of screen printing, anti-counterfeiting function.