Enlargement of printing size for glass screen printing

The main reason for the expansion of printing size is the low viscosity of ink and excessive fluidity; The enlargement of screen printing plate size during production is also the reason for the enlargement of printing size. To avoid excessive ink fluidity that may cause ink to flow around after printing, resulting in a larger printing size, it is advisable to increase ink viscosity to reduce ink fluidity. When making screen printing plates, it is necessary to strictly ensure the quality and tension of the screen plate. 8. A part of the ink leakage in the printing plate film is called an ink leakage fault. The reason is that a part of the scraper is damaged; The pressure of scraping ink is high; The gap between the plate and the glass is too large; Large deformation of the plate frame, insufficient local printing pressure: uneven ink; The screen is too fine; Printing speed is too fast, etc. If dust is mixed on the glass and ink and printed without treatment, the film may be damaged due to the pressure of the scraper; Insufficient exposure during plate making, such as pinholes, can cause ink leakage in the plate film. At this point, adhesive tape or other materials can be applied from the back of the board for emergency response. If this operation is not very rapid, it will cause the ink on the plate to dry, and the entire plate will have to be wiped with solvent. Wiping the plate is also the cause of film peeling, so it is best to avoid it. Ink leakage often occurs in the area where the ink stays, so it is best to strengthen this part during plate making.