| abstract |
Recording paper which forms, for example, a red color when scratched with a thermal pen or head at a certain temperature and which forms, for example, a blue color when scratched with a thermal head at a higher temperature, said dichromatic thermosensitive paper having first and second layers formed from a dispersion in a film-forming binder of discontinuous particles of a leuco base of triphenylmethane or fluoran type dye and a phenolic acidic substance or an organic acid; and, disposed therebetween an inter layer capable of being thermally fused to dilute as well as to exclude the color formed in the first layer. |