| 摘要 |
PURPOSE:To prevent peeling of a surface protecting film in exposure process by making the peeling force of the self-adhesive tapes fixing the photosensitive material having surface protective film onto a fixing plate from the said protective film to the specific values. CONSTITUTION:Exposure is performed by fixing a photosensitive material 1 having a surface protective film 1a to a fixing plate 2 by means of self-adhesive tapes 3, placing an engraving film 5 affixed to a print frame glass plate 4 attached with a rubber packing 6 at the circumferential edge part thereon and closely contacting the film 5 with the photosensitive material 1 by sucking through a suction port 7. In this exposure method, the peeling force between the said self-adhesive tapes 3 and the protecting film 1a is made less than 20 times the peeling force between the protective film 1a and an under-layer thereof (photosensitive material 1). Namely, this may be achieved by using tapes of smaller self-adhesive forces than those of conventional uses as the tapes 3 or applying release agent treatment to at least the peripheral parts of the protective film 1a of the photosensitive material 1. |
