1, one of the solutions to the moire problem is to try to find a certain appropriate proportion of mesh and mesh number, and the network line Angle, mesh geometry, ink conditions, printing conditions and other factors to optimize, so as to achieve the purpose of avoiding moire.Pay attention to each link of the technological process in production.Including ink brand, ink color, printing conditions, film quality, cable Angle and cable number.
2. The color we feel is not only related to the size of the printing point, but also related to the thickness of the ink layer.Mesh size, mesh diameter, template thickness, ink types and ink viscosity will affect the thickness of the ink layer.
3, the low elasticity of the screen is the main reason for the poor image quality of silk screen products.Problems usually associated with low screen elasticity include excess ink transfer, uneven printing ink layers, image defects such as stains or missing details.For multicolor printing.It is important to maintain a high level of elasticity and stability; otherwise, overprinting inaccuracy, moire, mesh markings, and associated image defects may occur.
4, when the press if more than the required pressure value, the squeegee pressure out of the ink will not increase, on the contrary, due to the pressure will cause the squeegee tip is too bent, causing the squeegee can not be fully scraping the ink.Printing too high, will shorten the screen and scraping life, or even broken net.
5, the ink allocation is poor, or the normal allocation of ink mixed with a hard particle, due to the effect of the solvent expansion, softening, will be through the ink mesh blocked, played a role in the film, so that the ink can not pass, causing inking uneven.
6. If dust is mixed on the substrate or in the ink, it will scratch the plate film under the pressure of the scraper during printing;The solvent in the ink will also make a plate pinhole, which is the cause of the plate ink leakage.
7, the appropriate screen tension is to get a stable and consistent release clearance.Promote accurate ink transfer as required.Tension should be equal in longitude and latitude.Without balanced tension, moire and overprinter inaccuracy will occur.
8. The parallelism of each printing unit is the first consideration for color overprinter.The side edge, mesh, mesh frame and printing platform must be parallel at all points.To ensure that the distance from the plate is always the same, – the transmissibility is very important for every part of multicolor printing.
9, the purpose of the off-plate clearance is to facilitate the separation of screen and substrate in printing, unless the off-plate clearance is set correctly, the size and accuracy of the image may change.