| 摘要 |
PURPOSE: To obtain an excellent forgery preventing function by layering a top paper having a coupler layer which contains an electron donating coupler formed on a rear face of a support body, a middle paper having a self-coloring layer on the surface of the support body and a coupler layer on the rear face, and a bottom paper having a developer layer. CONSTITUTION: A top paper 11 has a coupler layer 12 which contains a black coupler-containing microcapsule 12a on its rear face. A middle paper 14 has a self-coloring layer 13 consisting of a developer layer 13c and a coupler layer 13b which contains a red coupler-containing microcapsule 13a on the surface and also has a coupler layer 15 which contains a red coupler-containing microcapsule 15a on the rear face. A bottom paper 17 has a developer layer 16 on the surface. The papers 11, 14, and 17 are superposed so as to form a pressure sensitive recording sheet. In this sheet, even when the middle sheet 14 is pulled out and an amount is written on the top paper 11, a black character is printed on the developer layer 16 not a red character, so that a forgery can be easily checked. |
