Gold color offset printing caused the causes and preventive measures - Indian gold color - Printing Industry

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Process, the offset printing gold (silver) printing process there are many manufacturers in the selection. Indian Gold (silver) has imprinted exquisite solid, metallic sound, opacity, high-floating force, able to show strong metallic luster, and low cost. Offset printing companies can directly select the gold (silver) color offset printing ink product, or copper powder (aluminum paste) and offset adjust salt bullion gold oil from the transfer printing ink in two ways.





Print Network HC In today's Package Decoration, etc. Print Products, in addition to using hot stamping (silver) process, the Offset printing Indian gold (silver) printing process there are many manufacturers in the selection. Indian Gold (silver) has imprinted exquisite solid, metallic sound, opacity, high-floating force, able to show strong metallic luster, the advantages of lower cost. Offset printing companies can directly select the gold (silver) color Offset printing ink Finished or copper powder (aluminum paste) and offset adjust salt bullion gold oil from the transfer printing ink in two ways.
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1, a basic component offset gold ink


Bronze powder (aluminum paste) 30 ~ 50%


Transfer payments offset 70 to 50% oil


Full mixing bronze powder (aluminum paste) and transferred money into gold and silver ink oil can





2, resulting in color printing money causes and preventive measures


1. PH paper As pulp and Papermaking The process of dealing with improper reasons, such as pulp bleaching with acid or left residual chlorine, acidic paper will, but increases in alkaline filler, pigment will be made when the paper is alkaline. If the acidic paper and acid blotting paper will play an inhibitory role in oxidative dry conjunctiva, so that slow drying; and too alkaline paper in the printing process of the alkaline substance will continue to transmit to the sink solution, to the original weak acid Fountain Solution Been in and affect the normal Fountain Solution PH values, causing the remaining ink color modification, addition, make ink emulsification, resulting in floating dirty. Therefore, the choice of paper PH value is 7, which is the best neutral, and can avoid the discoloration.





2. Fountain solution and ink balance PH value


Use of plates Photo hydrophobic part of the pro-oil, non-graphic part of the principle of hydrophilic thinning oil offset printing, fountain solution in the acidic substances can play the role of layout clean than dirty, but the acidity is too strong easily lead to India gold color, loss of metallic luster, resulting in plate flower version, blot dry slowly, on the back of quality problems such as sticky dirty; the acid is too weak, dirty plates from the network graphic, paste version. It is generally fountain solution of the PH value 5 to 6 is appropriate. Ink can not afford to balance the plate is dirty, do not paste version of the premise, the use of water as little as possible so that emulsion ink volume of 25% less than the minimum range. Because the water is too large, too easily lead to India pale gold ink, gold ink dull, bright colors and gold ink is emulsified, paper and other flexible deformation caused by quality defects are not allowed to overprint; water is too small, easy to layout from the dirty, greasy from and the emergence and paste version of class issues, so grasp the ink-water balance is critical. In addition, the intermediate roll to be out of ink and water systems, is also essential to avoid methods.





3. Printing speed Fast printing speed, easy to roller generated intense frictions between, and then heat the ink color, the general experience is that control of 5,000 sheets / hour is appropriate.





4. Bronze powder, aluminum oxide paste


Easily oxidized silver and gold color with the shortcomings, it is not used up the gold and silver powder must be kept isolated from air-sealed preservation, and storage time should not be too long.





5. PH adjusted gold oil





Silver and gold have easily oxidized nature of the use of transfer payments so the oil must be oxidation of small, fast drying neutral pH in solid, high viscosity resin oil, the sky in order to avoid oxidation of long-term preservation, and the most good use of that tune with the self-deployment method can further improve the oxidation discoloration.