| abstract |
An ink composition comprised of (1) an ink vehicle of (a) alkyl alkyl ketones of the formula CH 3 (CH 2 ) m CO (CH 2 ) n CH 3 where m and n represent the number of segments and wherein alkyl contains from about 1 to about 25 carbons, (b) alkyl aryl ketones where each alkyl contains from about 1 to about 20 carbons, and the aryl is anthracene, naphthalene or phenyl, (c) arylaryl ketones where each aryl is benzyl, phenyl or naphthyl, (2) an ink viscosity component, (3) a conductive compound, (4) an antioxidant compound, (5) a lightfastness component, and (6) a colorant. |