Offset printing machine primary color gold and silver printing method

Abstract

The invention discloses a primary color golden and silver printing method of offset machine. Golden and silver power below 170 D is selected, high transparent printing material gloss oil and golden and silver power are selected to be blended proportionally into offset ink; golden or silver special color plates are made into soft printing resin plates; pressure gap of inking rollers of an offset press is lifted, and the soft printing resin plates are mounted; working pressure of the inking rollers is adjusted according soft printing pressure standard; transferring pressure of the soft printing resin plates and rubber blankets is adjusted; inking collecting quantity of inking collecting roller is adjusted; pressure of inking transferring rollers is reduced, and inking following quantity of golden and silver power is guaranteed to meet printing requirement during inking; prepared offset ink is added in a duct of the offset press and the offset press is switched on to work normally. The primary color golden and silver printing method of offset machine has the advantages that normal offset presses are utilized, and the soft printing resin plates are utilized to print offset ink with golden and silver power large in granules directly on papers, so that golden and silver inherent color and metal sense can be restored on above 90% areas of printing products.

Description

technical field [0001] The invention relates to a printing method, in particular to an offset printing machine primary color gold and silver printing method. Background technique [0002] Primary color gold and silver printing is a printing technology in which the color that appears on the printed matter after printing is basically the same as the actual color purity of the corresponding gold and silver powder. However, when the current offset printing machine prints gold and silver inks, due to the limitation of the offset printing machine by the principle of water-oil separation printing, the particle size of the gold and silver powder in the gold and silver ink used must be 240-250 mesh. In the carrier oil of the ink, it can be effectively integrated into the ink, so that the gold and silver powder can be guaranteed not to be wiped off by the water roller during printing, and can pass through the ink transfer system of the offset printing machine to reach the printing pla...

AI Technical Summary

Problems solved by technology

Gold and silver powder with a particle size greater than 170 mesh cannot reach the printing plate through the wipe of the water roller

However, it is this ultra-fine gold and silver powder particles that greatly affect the light color and color reflection ability of itself, making the printed matter dark and gray, and basically losing the brilliance shown by gold and silver. And noble color and gloss effect, greatly weakened the product grade of printed matter