| 摘要 |
<p>PURPOSE:To obtain an offset plate by direct drawing excellent in the stability such as friction resistance by a method wherein a layer containing a photohardening microcapsule wrapping a photosetting resin or the like is provided on a water resistant support and exposed entirely to light after printed under pressure. CONSTITUTION:A layer containing a photohardening microcapsule wrapping a photosetting resin (preferably, a photopolymerizing resin having acryloyl group, aryl group, vinyl group or the like) is provided on a water resistant support and when the surface thereof is printed under pressure, microcapsules corresponding to the graphic section are broken to release the photosetting resin wrapped. Then, when the entire surface thereof is exposed to light, the photosetting resin released on the surface is hardened in the graphic section while the photosetting resin wrapped with the microcapsule is hardened in the non- graphic section. This allow no external impact to release the material wrapped, providing an intended plate. For example, when a reactant of an electron releasing compound and a coreactant of an electron accepting compound are contained in the microcasule, they contact each other during the destruction of the capsule to color the graphic section.</p> |
