Polishing fault handling

(1) Failure phenomena Varnish on the varnish is high, and the flow is uneven. The varnish oil system is too hard and the consistency is low (especially gravure coating oil tends to appear orderly and neat white line marks); the viscosity is low ( Light oil can not stand up), uneven, showing various forms of water lines; coating film too fast, uneven, the result surface like orange peel; coated roller is too rough, or rough rubber roller is not Smooth, or gravure mesh hole is too large, the amount of coating oil is excessive; the pressure between the coating oil roller and the impression roller is uneven; there are dust impurities in the varnish, or impurities in the varnish tank; The substrate (including packaging printing ink ink film) has dust on its surface.

(2) Solution Reduce the viscosity of coating oil; control the hardness of coating system; increase the resin content in coating oil; adjust the pressure between polishing roller and impression cylinder; filter coating oil or wash varnish tank Contaminants in the bucket; Clear the surface of the substrate (that is, the semi-finished packaging printing product) dust or add a blowing device; add 0.1-1.0% leveling agent.