The housings of consumer electronics products are often made of anodized aluminum or coated plastic. Electronic displays are made of acrylic, and mobile phone cases typically made of wood, leather or textiles. Depending on the material, these can be marked with a CO₂ or fiber laser. During laser engraving, a varying amount of the top layer is removed- depending on the laser power level used- creating varying contrasts. It is not possible to cut anodized aluminum or metals with the laser.