In ceramic, the transition from "contact" decoration by means of silk- screen printing (and silicone rollers) to the digital inkjet decoration certainly opened new possibilites, expanding the aesthetical options of ceramic material. While the new technology has reduced or even eliminated some kind of problems, new critical issues (to be monitored, prevented or solved) have emerged along the production lines.
The new scenario has forced, in fact, a different attention to all those applications that occur on the glazing line both before and after the digitial printing process. In particular, the different nature of the solvent-based inks with respect to all the water-based applications of the glazing line (engobes, glazes, grits, etc.) often lead to repellency phenomena that compromise a proper printing process. In addition to that, the glaze applied as a final protection (and so on the ink), when not adequately mixed with the proper chemicals, may lead to problems of excessive/restricted drainage or even to phenomena of inhomogeneous ink's absorption.
What kind of action must be taken in all these cases? What are the PRIMERS usually involved and how do they work?
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