Mobile case covers, client electronic merchandise and electronic displays covers are typically coated with anodized aluminum or coated plastic. Acrylic or polymethyl methacrylate is usually used for the manufacturing of electronic displays whilst mobile cases are mostly manufactured from wood, leather or textiles. During the engraving process depending on the material, these can be marked with a CO₂ or fiber laser. The laser power level used creates variable contrasts. Important to remember is that a laser cannot cut metal.