When printing silicone screen printing, how does adding glitter affect ink viscosity?
Ink viscosity has a significant impact on glitter distribution and printing quality. If the ink viscosity is too high, the glitter will be difficult to evenly disperse in the ink, and the ink will have poor flow through the screen during printing, resulting in incomplete glitter transfer and unclear printed patterns. If the ink viscosity is too low, the glitter will easily settle, resulting in uneven glitter distribution and even ink bleeding during printing.
Glitter from different materials varies in gloss, corrosion resistance, and high-temperature resistance. For example, PVC glitter and PVC laser glitter are not acid-, alkali-, or high-temperature resistant, with a maximum temperature resistance of around 60°C. PET glitter and PET laser glitter are acid-, alkali-, and high-temperature resistant up to around 190°C. Metallic glitter is acid-, alkali-, and high-temperature resistant up to around 250°C and is primarily used for injection molding. The choice of glitter should be determined based on the silicone product's intended use and requirements.