Vacuum Metallized Paper Printing Technology In The Different Notes
1. Prepress process design Printed products as vacuum aluminum poor wear resistance
, low gloss, material easy to break, crease line easy to practical problems such as the presence of scab in crude, will directly lead to product shape difference, material stiffness is not good, printing ink there will be minor cracks and other issues. Therefore, in addition to select high quality of Metallized paper, the design in the printing process, we should make full use of Metallized paper properties, and avoid weaknesses. Such as graphic design for print, pattern language to avoid using large opaque ink for background, and more effective with the end exposed to highlight the unique metallic luster color Metallized paper. For offset printing dot image, the area is small is better to avoid large areas of four-color overprint, Multi-color printing to enhance color saturation. Select the color should be to highlight the tendency of Metallized paper metal color and gloss, less use of large spot color contrast. Select the transparency of ink should be used as well to print. Metallized paper should pay attention to the metallic luster of the ink coloring effects, different background have different colors cardboard effect. If printed on a transparent yellow aluminum layer can be golden brown. Small text and lines to avoid trapping trapping, so as not to reveal the end or the wrong color, increase the overlay difficulties, increased rejection rate. Try not to crease line of special blocks of color printing a large area to prevent scab in crude or crease lines appear to make up for the shortage of material folded. Metallized paper printed more about the performance, finishing processes and customer requirements of the packaging process on the machine, take full account of Metallized paper printing special, multi-color mix with a very.
2. Ink selection Vacuum Metallized paper applies UV inks Printing, can be offset, screen printing, gravure printing, etc., but different methods of printing ink requirements vary. Vacuum Metallized paper by the 10 non-rubbing, so pay attention to the printing process to minimize the number of overlay, and the speed not too fast, the other based on specific circumstances aluminum materials, process recipe, change the paper easy to crack a hard time , when the paper is not soft wear phenomena; generally to reduce the number of ink viscosity, in order to avoid affecting the combined effect of the product. In the ink used on ink and printing materials should pay attention to the match, Metallized paper surface coating suitable for use water-based paint; Metallized paper's water content to 5% to 6% more appropriate. Vacuum Metallized paper for the crack problem, which is usually packaged in a printed or even two months there, in order to avoid this situation, and generally to do the printing test, put through a period of time to test their the stability of the material, to be eligible after the mass production of materials.
(1) offset printing, screen printing Vacuum Metallized paper layer of ink absorption of aluminum is poor, especially during offset printing, the ink in a vacuum Metallized paper on infiltration, aggregation, oxidation, conjunctiva, drying process takes longer. Because of poor adhesion, and sometimes breaking off the mouth ink, UV offset ink can try POP ink, and be mindful of ink viscosity. Offset and screen printing ink according to the drying speed to determine the boot speed of the water to control the offset is not dirty version shall prevail. Many Vacuum Metallized paper manufacturers to facilitate the final drying, usually to the back coating of water, but not before available to the printing business to return to treatment, making Metallized paper in the printing process, easy to curl. Metallized paper itself has a certain surface micro-holes, water can penetrate into the paper shows the importance of moisture control.
Metallized paper printing ink adhesion to pay special attention to color fastness and explosive issue, the ink adhesion fastness, there are two cases, one after the printing ink printing ink printed on the first pull-out; 2 the surface of the printing paper after the ink fastness not easy to pull off. Solution, the former suggested that color Gan asked to increase or use of UV curing intensity wet wet trapping, will be part of curing process in the collection of paper at once; the latter is the use of UV curing inks with high toughness, and add special notes in ink ink oil adjust its viscosity. As for the color explosion problem, the general solutions are: First, UV printing, conduct water-based varnish primer; Second, it has two special blocks of color overprinting to increase ink thickness increased folding resistance; 3 is to select the high toughness ink.
In offset and screen printing process of vacuum aluminum material, as UV offset ink and paper adhesion is poor, sometimes occur off the mouth phenomenon of ink broken, it should be aware of the ink adhesion, and be mindful ink viscosity. Offset and screen printing ink according to the drying speed to determine the boot speed of the water to control the offset is not dirty version shall prevail. Vacuum Metallized paper because the surface like paper, aluminum foil paper and PET, it has some tiny holes, water can penetrate into the paper, it is important to water control; Vacuum Metallized paper for printed materials can not be too many pile up , cardboard up to more than 3000, because the surface of the vacuum Metallized paper does not wear, piling up too much area will be crushed and India; attention Vacuum Metallized paper storage time not too long, preferably not more than two months, because a long time with the paper on the back surface of adhesion, resulting in paper-based blur; Vacuum Metallized paper printing should pay attention to the temperature not too hot curing, high temperature vacuum Metallized paper will affect the surface, so that changes take and hot deformation of paper shrink up too much of post processing effects.
Vacuum Metallized Paper Printing Technology In The Different Notes
By: frbiz2@foxmail.com
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