If there is no problem with the quality of the ink, what are the causes of bubble generation during the silk screen process? How to deal with it?
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Reasons and solutions:
(1) The viscosity of the ink is not correct and must be diluted.
(2) The printing speed is fast, the mesh distance is large, and the air bubbles are pulled out because the screen bomb is too fast from the substrate.
(3) If the wrong solvent is used, the miscibility with the ink is poor, so it is necessary to use a special solvent for the ink.
(4) The use of a fast drying solvent in the case of high temperature and low humidity causes the surface layer of the conjunctiva to be too fast and bubbles appear.
(5) Air bubbles are caused by the state in which the surface of the substrate is not easily wetted.
(6) The ink expires.