| 摘要 |
PURPOSE:To carry out color printing simply in low cost, by a method wherein paper having plural color layers laminated thereto is irradiated with laser luminous flux and the surface layer is peeled by the energy of said laser luminous flux to expose the desired color layer. CONSTITUTION:Plural color layers, for example, 3a, 3b, 3c are formed on a sheet like member 2 as a substrate and light absorbable black thin layers 4a, 4b, 4c are respectively formed between the color layers and on the surface thereof to obtain paper 1 having a laminated structure. Above this paper 1, one or more laser beam source 6 of which the output and the diameter of a luminous flux spot are controlled by a control circuit 7 is arranged and, when the paper 1 is irradiated with single laser luminous flux L with low intensity, a fine hole 8 is opened to expose the color layer 3c and, when two continuous pulse luminous fluxes are oscillated, a hole 9 is opened to expose the color layer 3b. By this mechanism, color printing is performed. |
