Abstract: A compound of Formula (1) and salts thereof wherein the variables are as defined in the specification:Ar.sup.1 N.dbd.N-J-X-L-X-J-N.dbd.NAr.sup.2 (1)A compound of Formula (1) is suitable for use in the coloration of cellulosic substrates, such as paper, to give bright prints with good light and water fastness. It is especially suitable for use in the printing of paper by non-impact printing techniques, such as ink jet printing, especially thermal ink jet printing.

Abstract: A compound of Formula (1) and salts thereof:Ar.sup.1 N.dbd.N--J--X--L--X--J--N.dbd.NAr.sup.2 (1)wherein: ##STR1## Ar.sup.1 and Ar.sup.2 are each independently aryl containing at least two carboxy groups; andL is a group of the Formula (3a) or (3b): ##STR2## in which T.sup.1 and T.sup.2 each independently is C.sub.1-4 -alkyl, C.sub.1-4 -alkoxy or C.sub.3-4 -alkenyl;T.sup.3 and T.sup.4 each independently is H, C.sub.1-4 -alkyl, C.sub.1-4 -alkoxy or C.sub.3-4 -alkenyl provided that T.sup.3 and T.sup.4 are not both H;each X independently is a group of the Formula (4), (5) or (6): ##STR3## each Z independently is H, halogen, alkyl, NR.sup.1 R.sup.2, SR.sup.3 or 0R.sup.3 ;each Y independently is Z, SR.sup.4 or OR.sup.4 ;each E independently is Cl or CN; andR.sup.1, R.sup.2, R.sup.3 and R.sup.4 are each as defined in the specification.A compound of Formula (1) is suitable for use in the coloration of cellulosic substrates, such as paper, to give bright prints with good light and water fastness.

Abstract: A compound of Formula (1) and salts thereof: ##STR1## wherein: L is optionally substituted piperazinyl;D is optionally substituted phenylene or naphthylene;E is optionally substituted phenylene, naphthylene or quinoline;R is H or C.sub.1-4 -alkyl;Z is optionally substituted carboxyaryl; andn has a value of 0 or 1.A compound of Formula (1) is useful as a colorant for black inks suitable for ink jet printing.

Abstract: A compound of Formula (1) or salt thereof: ##STR1## wherein: R.sup.1 is H, C.sub.1-4 -alkyl, C.sub.1-4 -alkoxy, CO.sub.2 H, SO.sub.3 H or --NR.sup.3 R.sup.4 ;R.sup.2 is H, C.sub.1-4 -alkyl, C.sub.1-4 -alkoxy, CO.sub.2 H or SO.sub.3 H;R.sup.3 and R.sup.4 are each independently H, C.sub.1-18 -alkyl or R.sup.3 and R.sup.4, together with the nitrogen atom to which they are attached, form an optionally substituted 5- or 6-membered ring;W is --OH and X is --NH.sub.2, or W is --NH.sub.2 and X is --OH; andY and Z are each independently --OH or --NR.sup.3 R.sup.4.The compound is suitable for use as a black component of ink jet printing inks.

Abstract: An ink containing less than 5% inorganic compounds which comprises a liquid medium and a dye of the Formula (1): ##STR1## wherein: D.sup.1 and D.sup.2 are each independently a chromophore of the azo series;R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are each independently H or optionally substituted alkyl;B is a labile atom or group, hydroxy, amino or an ether, thioether or amine group; andX.sup.1 and X.sup.2 are each independently H, halo, alkyl, alkoxy, acylamino, ureido, nitro, carboxy or sulpho.The inks may be used in ink jet printing either alone or with specified xanthene dyes.

Abstract: According to the present invention there is provided a compound which, in the free acid form, is of the Formula (1): ##STR1## wherein A is an optionally substituted phenyl or naphthyl group;Z is H, CO.sub.2 H, SO.sub.3 H or SO.sub.2 NH.sub.2 ;T is H or SO.sub.3 H;R.sup.1 is H or optionally substituted alkyl;V is H, CO.sub.2 H, SO.sub.3 H, CH.sub.3 or Cl; provided that the compound of Formula (1) has at least as many CO.sub.2 H groups as SO.sub.3 H groups.The compound is useful as a colorant for inks used in ink jet printing.

Abstract: Anionic azo compounds which, in the free acid form, have the Formula (1): ##STR1## Ar.sup.1 and Ar.sup.2 are each independently aryl or substituted aryl providing at least one of Ar.sup.1 and Ar.sup.2 has at least one substituent selected from COOH and COSH;each R.sup.1 and R.sup.2 is independently H, alkyl, substituted alkyl, alkenyl or substituted alkenyl;L is a divalent organic linking group;n is 0 or 1;each X independently is carbonyl or a group of the formula (2), (3) or (4): ##STR2## each Z independently is NR.sup.3 R.sup.4, SR.sup.5 or OR.sup.5 ; each Y independently is H, Cl, Z, SR.sup.6 or OR.sup.6 ;each E independently is Cl or CN;R.sup.3, R.sup.4, R.sup.5 and R.sup.6 are each independently H, alkyl, substituted alkyl, alkenyl, substituted alkenyl, aryl, substituted aryl, aralkyl, substituted aralkyl or R.sup.3 and R.sup.

Abstract: A compound which, in the free acid form, is of the Formula (1): ##STR1## wherein B is 3- or 4-carboxyphenyl; andX is H.The compound is useful in the preparation of inks for ink jet printing of substrates such as paper, on which it gives highly water fast prints which show little bronzing.

Abstract: A compound which, in the free acid form, is of the Formula (1): ##STR1## wherein B is 3,4- or 3,5-dicarboxyphenyl.The compound is useful in the preparation of inks for ink jet printing of paper, on which it has high water-fastness and low bronzing.

Abstract: An organic photoconductor comprising an electrically conducting support, a charge generation layer containing dibromoanthanthrone and a charge transport layer containing a di- or triarylmethane compound of the formula: ##STR1## wherein R.sup.1 represents hydrogen or an optionally substituted alkyl, alkenyl, cycloalkyl, cycloalkenyl, aralkyl or aryl radical;each of R.sup.2, R.sup.3, R.sup.4 and R.sup.5, independently, represent hydrogen or an optionally substituted alkyl, alkenyl, cycloalkyl, aralkyl or aryl radical, or R.sup.2 and R.sup.3 together with the attached nitrogen atom and R.sup.4 and R.sup.5 together with the attached nitrogen atom may form heterocyclic rings; andeach of R.sup.6, R.sup.7, R.sup.8 and R.sup.