How to properly design special paper printing layout?
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How to design a printed layout for special paper? Answer: It is necessary to rationally design the printing layout according to the characteristics of gold and silver cardboard, laser paper (including laminated paper, transfer paper).
Gold-silver paperboard and laser paper have high brightness and strong reflectivity. Therefore, according to the characteristics of the material, when designing the layout, attention should be paid to highlighting the gold and silver cardboard and laser-specific metal that cannot be displayed by the spectral color. Glossy, properly revealing the metallic hue of the surface to express the artistic beauty of the package.
When designing gold, silver cardboard or laser paper with a combination of field, line, text and image, it is necessary to avoid using too small black characters and small negative lines to prevent the appearance of paste and affect the printing quality of the product. Print lines, text or transparent, bright and small layouts on the surface of gold and silver cardboard and laser paper. Contrast and color saturation are poor. This design should be avoided as much as possible. Text, lines, borders, and logos should preferably be overprinted on the background and designed to be dark so that they are striking.
Due to the high brightness of the surface of gold and silver cardboard and laser paper, the micro-overprinting is not easy to detect with the naked eye. Therefore, it should be avoided to carry out precise overprinting of multi-color layouts. For the layout with precision overprint on the layout, it should be considered to enlarge the edge of the light-colored overprinting surface by about 0.2mm to avoid obvious whitening due to overprinting errors.
In addition, embossed gold and silver cardboard, laser paper should try to avoid printing small dots, so as not to affect the loyal and easy-to-apply paste phenomenon at the subtle level of the layout.
Printing process using "deep ink or secondary printing"
The surface of gold and silver cardboard and laser paper is non-absorbent, and the ink is dried by oxidative polymerization after it is printed. In this dry form of ink, once the ink layer is printed, it is not easy to achieve complete drying of the ink layer inside and outside, which will affect the normal overprinting, and easily cause the problem of sticky quality. In order to avoid this problem, when printing the spot color ink, it is advisable to appropriately adjust the hue of the ink to make the printing ink layer thinner, so that it can meet the requirements of the original printing hue and facilitate the overprinting. And better prevent the printed matter from sticking.
For printing gold and silver cardboard and laser paper, you can also use the method of “secondary printing”. The ink is printed once and then overprinted, which is beneficial to the rapid drying of the ink layer and better. Prevent the print from appearing dirty.
Printed technology control
After printing on gold and silver cardboard and laser paper, the ink layer is suspended on the surface film surface and will not dry quickly. If the process is not well controlled, it is prone to stickiness and affect the print quality of the product.
Printing anti-sticking control is important: using fine and uniform fine powder spray to spray and anti-adhesive printing semi-finished products; avoiding high-speed printing, printing machine speed of printing gold and silver cardboard and laser paper should be controlled at 3000 sheets /hour-5000 sheets/hour range is suitable; the semi-finished products printed on-line by the printing machine should be stacked by shelves, and the semi-finished products stacked on each shelf should not exceed 5cm; when the printed ink layer is semi-dry, the printed products can be printed. The paper stack is loosely flipped to allow oxygen to enter the printed paper stack to promote oxidative drying of the ink layer of the printing ink; the relative balance of the ink and the fountain solution should be maintained in the printing process with a minimum amount of fountain solution. Through the control of these technological processes, it is possible to better prevent the offset of the printed product.
The correct choice of ink varieties
Gold and silver cardboard and laser paper are non-absorbent substrates. The type of printing ink used should also match its characteristics to achieve normal printing and printing quality.
Because of various oxidized conjunctiva drying type inks, the hue, concentration, viscosity, vividness, adhesion and dryness of the ink are different due to the difference in color, fineness, content, dispersion and binder. It is also different. Therefore, printing gold and silver cardboard and laser paper packaging should be based on the characteristics of the product, the characteristics of the printing machine, the printing environment and other factors, and select the appropriate type of ink for printing to ensure the stable printing quality. Therefore, the purchase of gold and silver cardboard, laser printing ink, should choose a manufacturer with a certain scale of production, its quality is relatively stable and reliable, it is best to confirm the use of a manufacturer of ink. The company's special ink for laser paper developed according to the characteristics of gold and silver cardboard and laser paper has good printability. It has the characteristics of fast drying, bright color and good printability.