The reason of shrinkage cavity color printing packaging
color printing packing factory products can be used in many industries, but we found that in the process of manufacturing products will appear shrinkage cavity phenomenon, now it's time to carefully to understand this knowledge introduction?
in fact lead to products appear such problem is more, in the process of color printing packaging film, when the upper wet ink membrane surface tension is lower than the lower surface tension, can produce shrinkage cavity. Sometimes, when the ink film is about to happen shrinkage cavity, wet ink film lost liquidity inhibits the height shrinkage cavity. But in some gravure or printing & packaging job, with the increase of temperature, wet ink film and the liquidity, will probably be secondary porosity.
in the process of the prevention, correct use of related reagent method and the matters needing attention, including the dosage according to different products need control etc, we also must know something about, and perform correctly, they can better guarantee the beautiful sex of printing & packaging & packaging products.
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