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Printed matter enriches our life and brings convenience to our life. However, in Luxury packaging boxes printing, some colors are very difficult to print and difficult to control.1, gray balance, according to theory and production practice experience, the most difficult color to control print is gray balance. Gray balance is under a certain printability, yellow, magenta, green three primary color plate from light to deep according to a certain dot ratio combination overprint to obtain different brightness color, that is, to get ... more