摘要:
The thiol group-containing colored compound includes a chromophore having absorption in a visible light region, a thiol group, and a spacer provided between the chromophore and the thiol group. The spacer is a chain alkylene group having 2 to 30 carbon atoms, a cyclic alkylene group having 3 to 30 carbon atoms, or a derivative of either alkylene group in which the number of carbon atoms in an additional structure of the alkylene group is equal to or less than the number of carbon atoms in the alkylene group.
摘要:
The thiol group-containing colored compound includes a chromophore having absorption in a visible light region, a thiol group, and a spacer provided between the chromophore and the thiol group. The spacer is a chain alkylene group having 2 to 30 carbon atoms, a cyclic alkylene group having 3 to 30 carbon atoms, or a derivative of either alkylene group in which the number of carbon atoms in an additional structure of the alkylene group is equal to or less than the number of carbon atoms in the alkylene group.
摘要:
A reversible multicolor thermal recording medium capable of recording and erasing repeatedly high-contrast clear images free of color fogging without causing color deterioration and a method for recording on the recording medium. The reversible multicolor recording medium includes recording layers numbered from the first to the nth, which are formed on a supporting substrate separately and independently in sequential order, the recording layers each containing a reversible thermal color developing composition differing from one another in the hue of the developed color and further containing a light-heat converting composition which generates heat upon absorption of near infrared rays with a wavelength in different ranges, and the recording layers having respectively the absorption peak wavelengths λ max 1, λ max 2, . . . , λ max n, in the near infrared region such that 1500 nm>λ max 1>λ max 2> . . . >λ max n>750 nm.