Watson Cole Stevens & Davis
Trisazo compounds imparting deep black color a method for dyeing by using them and an ink containing them
 A trisazo compound represented by the following formula (I) in the free acid form: ##STR1## wherein Q is an phenyl or naphthyl group both of which may be unsubstituted or substituted; one of the A and B is hydroxy group and the other is amino group; K is 1 or 2; and one of m and n is 1 and the other is 0; a method for dyeing fiber materials, paper or leather by using the trisazo compounds and an ink containing the trisazo compounds, and the trisazo compound is excellent in solubility, and good in storage stability and free from clogging of nozzle caused by deposition. The ink using the trisazo compound gives a deep black-colored image excellent in clarity, water-durability and durability to light. 
Sumitomo Chemical Company, Limited
Y Y C Y Y
Y10S Y10S C09B Y10S Y10S
additional additional inventional additional additional
Kazuya Takashi Koji Yuriko Hideo Mahito
Ogino Omura Aburada Tamura Kawashita Fujita