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 Posted: Sun 5:21, 08 May 2011 Post subject: abercrombie en fitch How to control the quality of |
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How to control the quality of flexographic printing
Laser CTP plate technology,[link widoczny dla zalogowanych], is recommended. The cable version is made of 1% minimum dot, a good solution to the high quality level of production of the printed version of cable problems. There are already more sophisticated packaging technology to produce printed materials are made of flexible CTP printing plates. These fine products are generally in the visual conditions have been difficult to distinguish between offset, gravure or flexo printing. China to improve the quality of flexo printing has played a very big role. (2) double-sided tape to rely on a flexible plate special double-sided tape affixed to the surface of the plate roller, to form a complete printing rollers. Current widespread use of double-sided tape is a flexible pressure sensitive adhesive material, the polyethylene foam backing material, coated on both sides have different sticky acrylic adhesive, a single or double-sided strip of paper protection. In the flexo printing process, the selected version of double-sided tape affixed to the printed materials will directly affect the imprinting quality. Flexo double-sided tape, there are strict performance requirements: ① to ensure plate and a solid bond between the plate roll, and can be easily taken down. ② In the l50 ~ 250m / minute printing speed to ensure the printed version of the fastness and the overlay accuracy. ⑦ uniform thickness, elastic uniform compression of the deformation is not easy to ensure the imprinting quality. Flexible double-sided adhesive thickness commonly used in 0.38mm, 0.50mm two sizes; the substrate density, divided into three types: low-density 1115-type, suitable for cable version and fine line printing; medium density type 1015 for text, lines and field printing; high density 411DL type, suitable for printing field; new products 1815M type, it ranged between 1015 and 411DL, 411DL alternative use. Printing manufacturers generally must be prepared in three different densities of double-sided tape to suit the different needs of the printing plate graphic. (3) water-based ink water-based flexographic ink is the key material, it will directly affect the efficiency of the printing and print production of practical results. More water-based ink is now the brand, quality and price are quite different rational use of water-based ink is printed must master basic skills. Therefore, matching the needs of water-based ink note the following points: ① distinguish between the types and quality of printing materials; ether Muse installed ~ 12oo87 ② understand the practical requirements of printed products; ③ deployment of spot-color ink printing by the manufacturer or person responsible for custom ; ④ stability of water-based ink! DH value and viscosity; ⑤ control the amount of additives; ⑥ different brands of ink can not be mixed deployment. (4) Ceramics ceramic anilox roller is a people called flexo presses the Ceramic anilox roller and doctor blade of a reasonable match, an accurate and stable water-based ink is passed. Therefore, ceramic anilox rollers, also known as quantitative or measurement of roll,[link widoczny dla zalogowanych], flexo ink in the ink transfer manipulation remain at the value of the selected range of BCM. Flexo Products Ceramic Anilox selection: First of all colors according to print graphic dwell area, estimated by the daily experience of selected number of lines per inch of the Anilox to meet the ink blot. Second, according to the amount of printing ink material, the initial school GRAPHIC observed during the imprinting of each color hue, saturation of ink, again swapped the number of different line anilox, ink blot until compliance requirement. Common ceramic anilox line are as follows: Field Edition: 250 ~ 400 lines / inch, the text line version: 400 to 600 lines / inch, textured version: 550 ~ 800 lines / inch (for l33 ~ l50 mesh lines / inch ), 700 ~ l000 lines / inch (for 175 network lines / inch). The case of a color printed version of the inking roller Select the amount of demand, not only to pick the matching lines,[link widoczny dla zalogowanych], but also in the same number of lines in the BCM anilox value comparison, as this will be a reasonable choice. The number of general requirements with a multi-roller as well, so that different products, changes in the size of ink blot to choose. Must not hue to make do with deployment of ink,[link widoczny dla zalogowanych], this ink, ink difficult to achieve the optimum dosage, and the hue are difficult to achieve the best results. It is not only a waste of time and ink, can also cause imprinting of inferior quality. Over time, it brings the losses will be far beyond the purchase price of a few pieces of ceramic anilox roll. (5) with the scraping knife Daogua supporting ceramic anilox inking system composed of transmission. Now is configured flexo reverse doctor blade plug-in structure, easy operation and scraping it effective. Squeegee steel and plastic materials are two kinds of tablets, ground into a beveled edge port, enabling scraping clean. Squeegee pressure regulator to excess ink roller surface,[link widoczny dla zalogowanych], whichever is all cleared away, the pressure is not easy too large, so as not to damage ceramic anilox roller. The scraping blade worn should be replaced, otherwise the ink can not guarantee the quality of transmission.
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