| 摘要 |
PROBLEM TO BE SOLVED: To obtain the enhanced stability of a recording image, and improve preservation characteristics, in particular, improve its water resistivity finely by employing a specific phenol compound as a developer for coloring leuco dye on the support during the heating period. SOLUTION: Prepared for A liquid is 3-N, 20 pts. N-dibutyl amino-6-methyl-7- anilinofluoran, a 20 pts. 10% water solution of polyvinyl alcohol, 60 pts. water, prepared for B liquid is a 20 pts. developer, a 20 pts. 10% water solution of polyvinyl alcohol, and 60 pts. water expressed by a formula (however, (r) in the formula represents integral numbers of 1-3, and R represents. an aliphatic hydrocarbon radical that can include a substituent), and prepared for C liquid is 20 pts. silicon dioxide, and 80 pts. water. Next, 10 pts. A liquid, 30 pts. B liquid, 10 pts. C liquid, and 10 pts. stearic acid zinc dispersion liquid are blended to be heat sensitive coloring layer forming liquid. Then, a heat sensitive coloring layer is provided by application drying the heat sensitive coloring layer forming liquid on the surface of a marketing quality paper, and the surface is subjected to calender operation for manufacturing heat sensitive recording material. |
