| 摘要 |
PURPOSE:To enhance the green preservable property and color development density of the recording material by including leuco dyes which are different in color developing hues into high-polymer walls of different glass transition points. CONSTITUTION:The recording material is formed by providing a coating layer contg. microcapsules in which the leuco dyes capable of making oxidation color development and a photooxidizing agent are included and a reducing agent as essential components on a base. Two or more kinds of the respective leuco dyes which are different in color development hue are housed in the microcapsules consisting of the high-polymer walls of the different glass transition points. Polyurethane, polyurea, etc., are usable as the wall material. The glass transition points thereof can be changed by adequately selecting polyvalent isocyanate and polyol or polyamine which are the components thereof. |
