| 摘要 |
PROBLEM TO BE SOLVED: To provide a sensitizer for a specific developer which shows a superb coloring density and an outstanding storage stability of an uncolor developed part and a printed part by using the sensitizer, as shown by a specific structural formula, for the developer selected from the group of an isocyanate-state compound and an urea urethane compound. SOLUTION: The developer is a chemical compound which does not develop a color for itself but is capable of making a dye precursor develop a color through a chemical reaction with the dye precursor having a color developing ability. The developer to be used is the one selected from the group of an isocyanate compound and an urea urethane compound. The sensitizer has neither a practical color developing power nor a practical developing power itself but has a function to augment the color developing sensitivity of the dye precursor by using it with the dye precursor and the developer. The sensitizer for the specific developer to be used is the one as shown by a formula for this purpose. Thus it is possible to enhance the sensitivity and upgrade the keeping stability of the texture and the printed part. |
