What does it mean that the color box factory doesn't stick windows in four colors?

1, color box factory four-color refers to four-color printing, which refers to the printing process of packaging box manufacturers to copy the color of color manuscripts with yellow, magenta and cyan inks and black inks.

2. No window refers to a window without film. Window sticking refers to the post-press processing technology of sticking a transparent film on die-cut printed matter, which is often used to process window covers, folding cartons, CD paper bags and other products.