Colour laser marking
摘要:
A set of laminates includes an outer laminate and an inner laminate, wherein the outer laminate includes a transparent polymeric support including on a first side of the support a color laser markable layer containing an infrared dye having an absorption maximum λmax(IR-1) in the infrared region; wherein the inner laminate includes a transparent polymeric support including on, a first side of the transparent polymeric support, a color laser markable layer containing an infrared dye having an absorption maximum λmax(IR-2) in the infrared region and, on a second side of the transparent polymeric support, a color laser markable layer containing an infrared dye having an absorption maximum λmax(IR-3) in the infrared region; and the conditions a) and b) are satisfied: λmax(IR-1)>λmax(IR-2)>λmax(IR-3); and  a) λmax(IR-1)>1100 nm and λmax(IR-3)
公开/授权文献
信息查询
0/0