As we all know, flexographic printing has a phenomenon of unidirectional elongation along the direction of printing. The ratio of elongation depends on two factors. One is the diameter of the platen (including double-sided tape), and the other is the printing. Version body thickness. The larger the plate cylinder diameter, the smaller the plate thickness and the smaller the elongation. A concept that needs clarification here is that the elongation phenomenon is not caused by pressure in the printing. In fact, the flexographic plate has already undergone elongation deformation when the double-sided adhesive is stuck to the plate cylinder. Therefore, when designing the ink map, it is necessary to make a miniature version. The proportion is based on the thickness of the actual material used and the actual printing length. If you use computer-based platemaking, you only need to give a unidirectional reduction before you design a color separation. If you use hand-made film, you need to use a deformation machine, you can also get a reduced version of the film.