| 摘要 |
PURPOSE:To obtain a number of printed matters speedily by using a printing master plate with an insulative pattern layer of a corresponding positive or reversed negative image to image symbol information formed on a heat-conducting base with a conductive layer on the surface layer part. CONSTITUTION:The heat-conducting base of an electrostatic printing maser plate has a conductive layer on the surface layer part. The heat conductivity allows a heat signal to reach the other surface of the base when said signal is transmitted from one surface of the base. A laminated body consisting of resin or paper film and a conductive layer, a metallic plate foil and a conductivity-treated paper are used as the base. In addition, the conductive layer has conductivity and is made of a material with a specific resistance of less than 10<10>OMEGA.cm. Gold, silver and copper or their alloys and oxide alloys are used for the conductive layer. An insulative pattern layer of a corresponding positive or reversed negative image to image symbol information is formed on the surface of the conductive layer. Consequently, when this printing master plate is charged, the insulative pattern layer surface of the positive or negative image is charged. However, the conductive layer surface is not charged because it is electrically conductive. Therefore, a plurality of printed matters can easily be obtained speedily. |
