| 摘要 |
PURPOSE:To provide an original disabled to be copied and readable to prevent the original from being copied by processing the difference of light reflecting factor between a picture part and a non-picture part of the original to be a specified value or less. CONSTITUTION:A sheet 1 consisting of a hghly opaque material is adhered to the surface of an original sheet 3 to reduce contrast between the picture part and non-picture part of the original and make the spectroscopic reflection factors of both parts close to each other. If the sheet 1 having 70% or more opacity in JISP-8138 is adhered, the difference of the spectroscopic reflection factors between the picture part and non-picture part can be suppressed to 30% or less to obtain the original prevented from copying. |
