Mesh generation and adjustment methods for creating a halftone image on a deep-drawn cap

Abstract

It is desirable for deep-drawn bottle caps to have counterfeit-proof characteristics in addition to a delicate figurative design. This article presents mesh generation and adjustment methods to produce a delicate halftone image on a deep-drawn cap, so as to create a counterfeit-proof seal that solves the problem of the occurrence fake products in the cap industry. Because cap images are very sensitive, any defects in the image processing are easily noticeable to the naked eye. An image generation process used for drawn and redrawn two-piece food cans is introduced that creates a distorted image for printing onto a plane blank metal sheet. Along with the can formation and drawing process, the printed distorted image is deformed in order to result in the desired finished form. Using a similar but relatively difficult technique, the process for creating an image on a deep-drawn cap is discussed, whereby the mesh generation methods and the associated adjustment techniques are utilized. A benchmark is provided to verify the applicability of this study and to demonstrate that the proposed methods can achieve the required aesthetic and counterfeit-proof purposes.