| 摘要 |
PURPOSE:To prevent unsharp printing due to the presence of air between an original film and a photosensitive plate material by inserting between a glass plate and an airtight sheet, extruding the air between the glass plate and the airtight sheet with a squeegee roller to evacuate the inside. CONSTITUTION:A photosensitive plate material 17 is overlaid on an original film 16 between a glass plate 13 formed on the main body 11 of a printing machine having a light source 12 in the inside and an airtight sheet 14 to execute contact printing. In this process, after inserting both of the film 16 and the material 17 between the glass 13 and the sheet 14, the air present between the glass 13 and the sheet 14 is extruded with a squeegee roller 21 to evacuate the inside between them, and then, printing operation is carried out. Since the air between the film 16 and the material 17 is thus easily and surely eliminated and the inside can be easily evacuated, unsharp printing due to the presence of the air can be prevented, the evacuation time is shortened to enhance operation efficiency. |
