For monochrome printing, it was normal that one black color was used, The technique of three primary color plus feature ... in commercial printing ... ww that was established in the 1970s, that is, printing was better than the limit of print expression. It is my gum pigment printing system. //////////////////////////////////
The technique of three primary color plus feature ... in commercial printing ... ww that was established in the 1970s, that is, printing was better than the limit of print expression. It is my gum pigment printing system.
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