| 摘要 |
PURPOSE:To prevent the omission of the central part of a picture by a method wherein a pressing force of 500g/cm<2> or more is impressed to the laminated body of an original copy and a heat sensitive transfer sheet and flash is projected thereon under this condition. CONSTITUTION:A sheet of heat sensitive color developing material, as the heat sensitive duplicating sheet, is put on the original copy having the picture formed by carbon black or the like while flash is projected thereon to reproduce the picture under a condition that the pressing force of 500g/cm<2> or more is impressed on the laminated body of the original copy and the heat sensitive duplicating sheet. As compared with the prior art, remarkably high pressing force is impressed, whereby the heat transmission thereof is improved, an unevenness in the heat shrinkage of an orientated film is eliminated and the film becomes uniform, the width of shrinkage is reduced since a force effecting a shrinkage into the orientated direction is restricted by the impressed high pressure, the residue thereof becomes fine and thus the assembly of more fine perforations, in which the perforations copying the push- printed picture are dispersed uniformly, may be produced. |
