In packaging In printing , gold and silver inks have a unique metallic luster, which can produce rich and colorful effects, beautify and enhance product packaging. However, the difficulty of printing gold and silver ink is relatively large. What aspects should be paid attention to in specific production?
1, the layout of the graphic design should be reasonable, if necessary, large areas and thin lines of gold and silver are divided into two versions. For the background color of the embossing, the thickness of the text is required. The cough is used for the field version. Generally speaking, the deeper the plate is, the better the color is, but the deeper the mesh will affect the drying speed of the ink layer. The adhesion fastness should be controlled and appropriate.
2. Different requirements for different materials. Due to the gold color on the paper, it is generally necessary to print a layer of light yellow ink on the paper before printing the gold ink. Silver is printed on the paper, and a layer of faint white ink is also laid in advance, and then silver is printed. The role of the bottom ink is to support the color, but to strengthen the adhesion of gold and silver ink. When printing gold and silver ink on plastic film, it is generally not necessary to lay the ground color in advance. In the processing method, most of them rely on a certain color block in the graphic, which not only plays a role of coloring and adhesion, but also makes the ink layer. Full, add luster of gold and silver ink layers.
3. To accurately use the corresponding gold-plated oil for different materials, stir evenly when adjusting the ink, and add the corresponding color ink appropriately.
4, to prevent sticking in the operation, the drying conditions should be good, the large area of ​​gold printing viscosity is slightly lower, the fine line printing gold viscosity is slightly larger.
5. Generally speaking, gold and silver inks are mainly applied on the solid parts or color blocks, and it is best not to design them as gold or silver for very fine intaglio, yang and gradation transitions.
6. If the substrate material is aluminum foil or vacuum aluminized paper, transparent yellow can be printed on it to achieve the golden effect; in the plastic film composite printing work, the transparent yellow is printed on the OPP plastic film and then the composite aluminum foil is printed. The ink layer also achieves a golden effect, which saves expensive metal inks while achieving the desired results.
7. In the process of plate making design, the color sequence arrangement of gold and silver ink should be considered to ensure the metal color.
8. If it is a printed product, after printing gold ink or silver ink, UV glazing or water glazing should also be considered, or the printed matter should be coated to prevent oxidative discoloration or falling off of the gold ink.
9. The winding tension should be as small as possible, and the printed film roll can be irregular within 20mm.
10, the winding length can not be too long, BOPP film is less than 3000m, PA, PET is less than 4000m.
11. The printing viscosity of the bottom of the bottom is as low as possible, using a quick-drying solvent.
12. If there is extra color, use it for drying.
13. When the production arrangement is made, the placement time of the printed products should be minimized, and the printed products should be compounded as soon as possible.
14. During the blanking and handling of printed products, pay attention to care and ease, and boost and strong impact are prohibited.
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