Assertion: coloring material | /r/CapableOf | meet the object
Facets:
Source sentences:
text: Intensive researches repeated by the present inventors in order to solve the conventional problems described above have resulted in finding that an ink composition for writing instruments and a coloring material which meet the object described above are obtained by using a coloring material obtained by adding at least one selected from a leuco dye, a halochromic dye and a photochromic compound to a specific compound, and thus, the present inventors have come to complete the present invention.