ã€China Aluminum Industry Network】 According to the characteristics of the aluminum plate paper reasonable design Aluminium layer of the printed plate surface after the brightness of the aluminum layer, the reflectivity is relatively strong, it should be based on the characteristics of the material, in the layout design, pay attention to outstanding performance spectrum The unique metallic luster of aluminized paper, which cannot be displayed in color, properly reveals the metallic hue of the coating to express the artistic beauty of the trademark.
When designing an aluminized paper brand with a combination of field, lines, text, and patterns, care should be taken to avoid the use of overly small black letters and fine lines to prevent prone to defects and affect the quality of the product. Printing lines on aluminum layers Smaller layouts with text, text, or transparent colors, poor contrast, color, and intensity, should be designed as much as possible. Text, lines, borders, and logos should be superimposed on the background color and designed in dark colors to give it a striking visual effect.
Due to the high brightness of the surface of the aluminized paper, a trace of overprinting cannot be easily detected by the naked eye. Therefore, a multi-colored layout should be prevented from being accurately overprinted with each other. For layouts with precision overlays on the layout, consideration should be given to expanding the edge of the light-colored overlays by approximately 0.2 mm to avoid apparent over-whitening due to overlay errors.
In addition, the embossed aluminized paper should try to avoid printing small dots, so as not to affect the faithful reproduction of the subtle layers of the layout and the prone to paste phenomenon.
The printing process of “deep ink thin or secondary printing†is non-absorbent on the surface of the aluminized paper, and the drying of the ink is mainly achieved by oxidation polymerization. In this type of dry ink, once the ink layer is printed thick, it is not easy to achieve complete drying inside and outside the ink layer. This will not only affect the normal overprint, but also cause the problem of sticky quality problems. In order to avoid this problem, when printing spot color inks, the hue of the ink should be appropriately deepened to make the printing ink layer thinner. This will not only meet the requirements of the hue of the original printing, but also facilitate the rapid completion of overprinting. , And better prevent the printed product from appearing dirty.
For printing on-site full-size aluminized paper, a “secondary printing†method may also be adopted. First, the ink is thinly printed once and then overprinted once. This facilitates the rapid drying of the ink layer and better prevents the appearance of the printed product. Viscous dirty phenomenon.
The anti-sticking process of printed products controls the printing of the aluminized paper. The ink layer is suspended on the surface of the aluminum film and will not dry quickly. If the process is not well controlled, it is easy to appear dirty and affect the product's print quality.
Printing anti-adhesion control mainly includes: fine and uniform high-quality dusting of particles, dusting and printing of semi-finished printing products; avoiding super high-speed printing, and printing machine speed of aluminized paper labels to control at 3000 sheets/hour - In the range of 5000 sheets/hour, the semi-finished products printed and printed on-line by the printing machine should be stacked and separated by partitions. The height of semi-finished products stacked on each partition should not exceed 5 cm; the ink layer of the printed product can be printed on half when it is semi-dry. The paper stack is loosely turned to allow the oxygen to enter the printing paper stack to promote the oxidative drying of the ink layer of the ink; the ink fountain and the fountain solution should be kept in a relatively balanced condition with a minimum amount of fountain solution during the printing process. Through the technical control of these processes, it is possible to better prevent the stickiness of printed products.
The right choice for aluminized paper inks Aluminized paper is a non-absorbent substrate, and the type of printing ink it uses should also match its characteristics in order to achieve normal printing and ensure print quality. Due to the variety of pigments, fineness, content, dispersion, and binders used in the drying of various oxidized conjunctiva-type inks, the hue, concentration, viscosity, vividness, adhesion, and drying of the ink are varied. And so on are different, so, printing aluminized paper trademark according to the characteristics of the product, printing machine characteristics, printing environment and other factors to consider, select the right type of ink for printing, in order to ensure the stability of product printing quality.
Metallographic Microscope Series
The structure of optical metallographic microscope generally includes magnification system, optical path system and mechanical system, among which the magnification system is the key part. The preparation process of metallographic samples generally includes five steps: sampling, rough grinding, fine grinding, polishing and etching. The interception of samples from metallic materials and parts to be tested is called "sampling". Selection of sampling sites and grinding surfaces must be based on analysis requirements. The size of the sample is not uniform, from the perspective of easy to hold and grinding, the general diameter or side length of 15~20mm, 12~18mm high is suitable. For those too small, irregular shape and the need to protect the edge of the sample, you can adopt Mosaic or mechanical clamping method. For the inlay of metallographic sample, the appropriate size (about φ L5-20mm) of steel tube, plastic tube or paper shell tube is placed on the smooth plastic (or glass) plate, and the sample is placed in the tube to be ground face downwards into the filler, which can be solidified and hardened for a period of time. 3) Chamfering On the premise of not affecting the purpose of observation, the edges and corners on the sample should be ground off to avoid scratching the sandpaper and polishing fabric.
metallurgical analysis,optical microscope for metallurgy,metallurgy microscope
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