| 摘要 |
PURPOSE:To judge easily the end of washing-out by adding a photosensitizer to the mixture of a spedified water soluble prepolymer with a water insoluble prepolymer or monomer and making the boundary between unexposed and exposed parts cloudly when uncured resin in the unexposed part is washed out with water or the like. CONSTITUTION:The unexposed part is emulsified with water or the like and dissolved, and the boudnary between the unexposed and exposed part is made cloudy. A water soluble prepolymer having (meth)acryloyl groups is blended with a prescribed amount of a water insoluble prepolymer or monomer to obtain a photosensitive resin composition. This composition is irradiated with ultraviolet rays or the like through a negative film or the like. When the unexposed part is washed out with water or the like, it is emulsified and dissolved, and the boundary between the unexposed and exposed parts is made cloudly. Thus, the end of washing-out of the uncured resin can be judged easily, and a plate having a clear image is obtd. The photosensitive resin composition can be used in the manufacture of a printing plate, a stamp or the like. |
