Metal scrap HS code classification

List of catalogs of this article:

• 1,Metal scrap HS code classification screen printing principle of plate roller
• 2, Why should the ink path system of lithography use the long ink path system?
• 3, Special color matching
• 4, Ask for a paper on printing major

The principle of screen printing of the printing plate roller

The plate-making process of RotaMesh screen is as follows: end ring connection. Bond the left and right end rings of the welded cylindrical wire mesh to the mesh with adhesive. Degreasing.The screen screen is degreasing before coating the photosensitive glue. Coating.

(6) Change the printing pressure. When the thickness of the gasket under the printing plate changes, the printing pressure will change, so that the purpose of adjusting the printing pressure can be achieved by changing the thickness of the gasket. The composition of the printing plate roller and the function of each part.

The principle of screen printing: Screen printing is a silk fabric woven of silk (fiber) in a certain way. Make a film with graphics on the screen. Some areas of the screen are covered by it, and some areas are exposed (this area is the graphics and text that need to be printed).

The basic principle of screen printing is that some of the meshes of the screen printing plate can pass through the ink and leak to the underprint; the remaining mesh holes on the printing plate are blocked and cannot pass through the ink to form a blank on the underprint.Traditionally, the method of manual plate-making is used, and in modern times, the photochemical plate-making method is more common.

Screen printing consists of five elements: screen printing plate, scraper, ink, printing table and printing material. Using the basic principle that part of the mesh of the screen printing plate can be printed through ink, and the non-text part cannot be printed through the basic principle of ink.

Why does the ink path system of lithography use the long ink path system?

The long ink road of the printing machine can make the ink uniform, but the disadvantage is that the ink is easy to print shallow. Short ink path ink printing is fast, the disadvantage is that the ink is uneven and the ink is deep. The length of the ink path has a great impact on the printing effect, which is mainly reflected in the glue head. The ink road is long, the glue head needs to be longer, and the ink printing is easy to fly ink, drawing and deformation.

is correct. The printing method is correctly classified according to the long ink circuit and the short ink circuit. The definition of excellent products, good products, etc. of printing quality is that the key to the performance of the fuzzy ink transmission device is the ink coefficient, the uniform ink coefficient and the number of ink lines.

The arrangement principle of the ink roller in the lithographic printing machine is: from top to bottom. According to the relevant public information, monochrome (or multi-color crew type) at home and abroadThe direction of the ink path of the lithography machine follows the principle of top-down. When the structure does not allow it, the ink is supplied from the bottom up, but this form affects the uniform ink effect.

Ordinary embossing is a long ink road. According to the relevant information of the query, the long ink road ink supply system and the short ink circuit ink supply system respectively include: the transmission of offset printing ink, the transmission of embossed ink, the short ink circuit ink supply system: the transmission of gravure ink (photographic gravure) and the transmission of flexographic ink.

At present, most of the applications used in China are unsaturated polyester, and the liquid photosensitive resin version is mainly made of phthalene and parabenzene.

Paper is made of interwoven fibers, and its hydrophilicity is better than that of oil. Therefore, printing only needs to gently touch the corrugated cardboard, and almost all the water-based ink will be absorbed by the corrugated cardboard. Lithography belongs to long ink transmission, while flexible ink is short ink transmission.Water-based ink is pollution-free, low cost, fast-drying, easy to operate, which promotes people's use.

color matching of special color

1. Special color is mixed with CMYK ink through a certain proportion (sometimes it is necessary to add metallic color, which is ignored here, because the special color with metallic color cannot be reduced to CMYK four colors), and this ratio The example is the ratio of CMYK (C: blue Y: yellow M: magenta K: black) four colors.

2. Special color ink is pre-mixed by the printing factory or produced by the ink factory. For each special color of the printed matter, there is a special color version corresponding at the time of printing. Using special colors can make the color more accurate.

3. Gold is actually a versatile color. If you want to match it with coffee, white, silver, camel, etc., it must be white;White itself is a pure color, while gold is a warm sun color. The contrasting color of the two is very beautiful.

Ask for a paper on printing major

. The definition of the claim in this machine said on the 9th that the second means, including a movable transport along the printing member and the tool transportation of the printing surface carriage along the printing member. 11.

For the first time, I have a clear understanding of the whole process of assembling an electrical appliance, and I have a new understanding of the interior of the whole charger. It turns out that there is human sweat everywhere! For a few weeks of electrician internship, I can't forget the manual design of the printing plate. It's really tricky without a certain amount of patience.

〈2) The body of the thesis: The body is the main body of the thesis, and the body should include arguments, arguments, argumentation process and conclusions. The main part includes the following: a. Propose - argument; b. Analyze the problem - arguments and arguments; c. Problem Solving - Argumentation and Steps; d. Conclusion.