Halftone textile silkscreen printing moire problem
The current textile silkscreen printing is divided into: flat screen silkscreen printing, rotary screen silkscreen printing, transfer silkscreen printing, inkjet silkscreen printing and other silkscreen printing process.
Due to the 4-color overlay screen version of the amplitude of hanging meshwork line number requirements in 3.5 times more, and textile flat screen silkscreen printing commonly used mesh is 100 mesh to 150 mesh, that is, the number of hanging lines can not be greater than 40 lines, 40-line screen silkscreen printing color Rough, not repeat them here.
As the flat screen silkscreen printing production process is simple and mature, fast, low cost, is the most widely used in the field of textile silkscreen printing silkscreen printing process. However, the largest screen silkscreen printing problem or moire problem, here to talk about how to solve the common print moire problem.
The current halftone grayscale hanging mesh are: amplitude modulation hanging mesh, FM l hanging mesh. Although FM hanging mesh is not prone to moire, the pattern can be more sophisticated, but the textile surface is relatively rough, and the need to set the ink amount, make the color paste better and calico combination, and FM hanging mesh outlets The same size, the meshwork is too small, too bad sex, easy to plug the mesh, the color difference is bigger, and the silkscreen printing paste more demanding, finer particles, better leveling, especially in the need of three-dimensional screen production stronger , FM meshwork screen exposure time is difficult to control. Therefore, in addition to small batch FM meshwork, in a large number of actual production applications or to amplitude-based meshwork-based.
The application of amplitude modulation is the most widely used in textile silkscreen printing. However, how to solve the problem of moire is also a common problem in the industry. This is also a worldwide problem. At present, there are textile flat screen silkscreen printing: paint silkscreen printing, reactive silkscreen printing, disperse dye silkscreen printing, water transfer silkscreen printing flowers. Printed matter knitted fabrics, woven fabrics, flocking cloth and other materials textiles. Materials are: cotton, linen, chemical fiber, silk and so on. Its characteristics are: Printed surface has thin and thick, thick and thin, knitted fabrics and woven fabrics are also divided by the number of lines. Because of these plates, we must first understand the substrate, the first choice of good mesh models and printed cloth matching, and some screen silkscreen printing cloth with tortoises, you need to pull meshwork angle to match.
Because of our naked eye 30cm distance can see the grid is below 70 lines, personally think: gray silkscreen printing pattern as long as the naked eye can not see the grid, grayscale pattern even without high-definition moire, that as long as the meshwork with up to 70 lines above the film production meshwork Version, and print out 10% to 90% grayscale pattern without moire to count HD screen.
How to use 120 mesh to 150 mesh design and production of more than 70 lines and can not produce moire?
1: To choose high-quality silkscreen printing S-type ultra-thin polyester monofilament yarn, the same mesh specifications different batches of meshwork requirements elongation - induced, mesh yarn diameter - induced, mesh aperture - induced.
2: to have a digital pull meshs, standard pull meshwork, to ensure that each screen is pulled well, diameter and latitude line straight line and is 90 degrees, each aperture consistent aperture, tension the same.
3: In fact, as long as the meshwork screen is pulled well mesh hole is square, the meshwork cable is straight, mesh and amplitude modulation linked to the meshwork as long as more than 2 lines, all screens must have an angle can match moire More than 140 mesh screen version can match more than 70 lines of amplitude modulation linked to meshwork without moire.
4: color design: As mentioned earlier, with 4-color overlay design grayscale halftone silkscreen printing coarse dots, the resolution is too low, why not use spot color? We are now commonly used in textile silkscreen printing 12-16 spot color flower machine, color full no problem, with spot design corresponding to the previous 1.2.3. Method, to completely solve the problem of moire.