Attation please, it cannot be used on any metal , like aluminum, stainless steel, iron etc. About Colors: Some colors may be changed after laser engraving, so the paper color looks like different from the , we remark ture color on the back, please subject to marked color Why You Need It: Direct engraving on glass, ceramics, etc. may failed and cannot be coloured, while laser engraving colored paper is the perfect solution for those issues. About Quality: All colored carved papers be well packed, but due to long time international shipment, some slight creases or air lines may cuased, please do not worry, it is not quality issue, and 't affect the engraving., Manufacturer: Akfldms