| 摘要 |
PROBLEM TO BE SOLVED: To prevent falling of images in a recording part caused by the coagulation of a developing agent or the like, and thereby make an excellent contrast between the decoloring part and the recording part by conducting dispersion in a water dispersive medium containing polyvinyl alcohol and an acetylene glycohol derivative of a specific formula at the time of manufacturing at least one kind of dispersive liquid of a dye precursor, a developing agent, and a heat dissolvable substance. SOLUTION: Polyvinyl alcohol and an acetylene glycol derivative shown in formula are dispersed in a applied manner in any of the water dispersive liquid of a dye precursor, the water dispersive liquid of a developing agent, and the water dispersive liquid of a heat dissolvable substance. In the formula, R1 , R2 show independently a CH3 , -C2 H5 , -C3 H7 , or -C4 H9 groups, R3 shows -(OC2 H4 )a -(OC3 H6 )a OH, or -OH, and R4 shows-(OC2 H4 )b OH, -(OC3 H6 )b OH, -OH, or -CH3 , wherein (a), (b) affixed downward express respectively (a)=1-10, (b)=1-10. |
