Most popular ink transfer printing

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Brief introduction of ink capillary transfer printing

ink is transferred from the ink hole to the surface of the printing material through the capillary effect (in some cases, the proofing machine also uses an electrostatic auxiliary ink transfer device). The large roller rotates to the end position of its circumference to get the largest printing sheet. After the rotation, the large cylinder leaves the surface of the plate cylinder. At this time, the plate cylinder can be cleaned and disassembled. For each color after the second color, repeat the same process as above after the previous color is dried

flexible packaging materials in printing will cause the expansion and contraction of printing materials. Printing companies require that there is an increase between the plates of various colors when making plate rollers, which will bring certain difficulties to proofing. Experienced operators can make samples with high registration accuracy through the drop of points

the ink transfer of the Japanese machine is to transfer the ink to the substrate by driving the embossing cylinder to rotate by the gravure cylinder. The machine speed is generally about 30m/min, but the separation speed of the embossing cylinder is different from that of the gravure cylinder from the start to the end. Because the substrate is tightly wrapped on the surface of the printing cylinder, the speed is accelerated under the inertia of the cylinder, and the proofing speed of the second circle will be faster than that of the first circle. The British machine completes the ink transfer by driving the plate cylinder to rotate through the pressure by the imprinting cylinder. The speed of the imprinting cylinder itself is kept at a certain level, and the speed of the substrate tightly wrapped on the imprinting cylinder is the same from beginning to end, thus solving the problem caused by the inconsistent rotation speed of the Japanese machine. During proofing, the substrate shall be tightly wrapped on the impression cylinder, and then proofing shall be carried out according to the printing sequence according to the internal printing and surface printing characteristics of the plate cylinder

the substrate of the inner printing plate is generally transparent. When proofing, it is marked with dark color first, and then light color on the basis of the previous color. For example, if the drive of the printing piece with only four-color Electrical Division diagram and white version is not normal, please reinstall the software. Usually, it is marked with black version first, then with education version, magenta version, then with yellow version, and finally with white version on the basis of these four colors. The proofing sequence of the surface printing plate is the opposite of that of the internal printing plate, which should not be ignored. Most of the substrate of the surface printing plate is opaque. When proofing, proofing is carried out from the light version to the dark version. When proofing, we must also pay attention to the important factor of proofing ink

the gravure proofing machine does not have an ink groove. When the impression cylinder is close to the gravure plate cylinder during proofing, the prepared ink is poured onto the gravure plate cylinder manually. Due to the low speed of the proofing machine, the viscosity of the ink used for proofing cannot be too low, otherwise it will lead to paste. Under normal conditions, the high-speed gravure printing machine can be opened to 160m/min, and the ink viscosity is about 16S, but the ink viscosity used for gravure proofing should be adjusted to about 20s. Slow proofing speed, high ink viscosity and low rubber hardness on the embossing cylinder are conducive to the ★ 5) unidirectional maximum tensile or compressive static load: not less than ± 100kN; Full transfer, proofing color will be more bright

if you do not add ink blending oil to dilute the ink during proofing, the printing company will suffer a lot because it is difficult for the printing company to print very bright and bright color effects. It is necessary for the plate making company to dilute the ink during proofing, so that it will be much easier for the printing company to carry out color matching proofing according to the gravure proofs. In the whole gravure plate making process in which the electric engraving has realized no film engraving, the Department with the most human factors is the gravure proofing workshop. Different dilutions and dilutions of proofing ink, different pressures between gravure cylinder and impression cylinder, different angles, installation methods and pressures of scraper, and different distances between scraper and impression point will all affect the effect of concave proofing. In the proofing process, the relevant parameters should be adjusted according to the different substrates, surface printing and internal printing characteristics, so as to produce a perfect gravure sample and the professional production level of the plate making company

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