Photo Etched Bookmarks

Photo etched bookmark would generally use the material of bronze, stainless iron or stainless steel. Since the logo and the bookmark clip are etched out by acid liquid but not mould, the thickness of the material should be not too thick. It would be around 0.3mm~0.6mm.
Considering the cheaper cost, some client might think about using the aluminum material. But actually, the aluminum material is too soft and not elastic enough, which might be broken easily.