| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an exposure apparatus of a printing plate, which is preferably direct platemaking with easy operation and improving safeness for white light without increasing the running cost even when the apparatus is used for a printing original plate having no oxygen shielding layer to be subjected to formation of a latent image by photopolymerization and then to alkali development. <P>SOLUTION: The exposure apparatus for a printing plate is equipped with: an oxygen shielding means to expose while eliminating oxygen in at least the exposed part during at least exposure; and an oxygen shielding period controlling means to control the oxygen shielding period by the above oxygen shielding means. Preferably, the oxygen shielding period controlling means controls the oxygen shielding period in an arbitrary period from a predetermined time prior to the exposure on the printing original plate to a predetermined time after the exposure. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
