| 摘要 |
PROBLEM TO BE SOLVED: To obtain a positive type visible ray sensitive resin compsn. capable of handling under the condition of bright safelight and excellent in sensitivity by using a visible ray sensitive resin compsn. incorporating a specified photosensitizer under an environment irradiated with specific safelight. SOLUTION: The visible ray sensitive resin compsn. is used in an environment irradiated with high relative luminosity safelight having the max. wavelength selected from the range of 500-620 nm and contains a positive type visible ray sensitive resin and an organoboron compd. of the formula as a photosensitizer. The absorbance of an unexposed coating formed from the compsn. is <=0.5 in the range of (the max. wavelength of the safelight) ± 30 nm. In the formula, R1-R3 and R5-R9 are each H, a halogen, nitro, cyano, an alkyl or the like, R4 is H, cyano, an alkyl, an aralkyl or the like and R10 and R11 are each halogen, an alkyl, an aralkyl or the like. The safelight is preferably emitted from a sodium-base discharge lamp. |
