Viscosity is an important indicator in glass screen printing ink. The viscosity is directly related to the quality of water-based ink in the printing process. How much is the viscosity of glass screen printing ink?

The viscosity of glass screen printing inks is generally required to be 15-55 s (coated 4# viscosity cup). If the viscosity is too large, the glass screen printing ink has poor transferability and paste; if the viscosity is too small, the ink is too thin, which may cause offset or migration and bleeding. Therefore, mastering the viscosity of glass screen printing ink is the key to making glass screen printing ink.

The solvent of glass screen printing ink is mostly water, the surface tension of water is large, and the compatibility with pigments and resins constituting glass screen printing ink is very poor. Some pigments are made into glass screen printing ink, and after one to two months of storage, glass screen printing ink There is no fluidity, and the anti-coarse can not be used, and the solvent-based ink has little such phenomenon during storage. Therefore, the glass screen printing ink has high requirements on the pigment. After the ink has been placed for 3 months, the ink viscosity is still maintained at 15-55 s.