Abstract: A phthalocyanine compound of Formula (I) wherein M is an oxymetal group, methods and uses involving these compounds

Abstract: The invention provides an ink composition comprising a charge generating material and a medium wherein the charge generating material absorbs radiation in both the near infra-red and visible regions of the electromagnetic spectrum. Also provided is an electrophotographic toner composition comprising a binder resin and the charge generating material. The compositions are useful in, for example, security marking wherein the composition is printed on an article or substrate. Methods of establishing the authenticity of an article or substrate are also provided which comprise detecting an absorption of infra-red radiation by the charge generating material.

Abstract: The invention provides an ink composition comprising a charge generating material and a medium wherein the charge generating material absorbs radiation in both the near infra-red and visible regions of the electromagnetic spectrum. Also provided is an electrophotographic toner composition comprising a binder resin and the charge generating material. The compositions are useful in, for example, security marking wherein the composition is printed on an article or substrate. Methods of establishing the authenticity of an article or substrate are also provided which comprise detecting an absorption of infra-red radiation by the charge generating material.

Abstract: A toner resin composition comprising a toner resin and the metal salt or complex of a carbocyclic hydroxy caboxylic acid containing at least one methylene group optionally substituted by hydroxy or amino such as 4-(N-methyl-N-2-hydroxyethyl)aminomethyl-3-hydroxy-2-naphthoic acid. Iron and zinc salts are preferred.

Abstract: A toner resin composition comprising a toner resin and an aromatic sulphonic acid salt of a guanidine such as the bis-diphenylguanidine salt of naphthalene-1,5-disulphonic acid. The diphenyl guanidine salts are novel.

Abstract: Colored cyan toner for electroreprography and laser printing based on Solvent Blue 70 and a trichomatic set of colored toners based on Solvent Blue 70, benzodifuranone red dyes and azo pyridone yellow dyes.

Abstract: Process for manufacture of the heterocyclic compounds of the formula: ##STR1## wherein X is cyano, acyl, alkylsulphonyl, arylsulphonyl, optionally substituted alkoxycarbonyl, nitro, phenyl or sulphamoyl, andY is hydrogen, optionally substituted alkyl or optionally substituted aryl, which comprises reacting a compound of the formula: ##STR2## with an acid halide in the presence of a compound of the formula ##STR3## and optionally in the presence of an aprotic solvent, and subjecting the resulting compound of the formula: ##STR4## or an acid salt thereof, to hydrolysis in acidic medium, wherein Z is hydrogen or an optionally substituted alkyl or aryl radical, and R.sup.2 and R.sup.3 each independently representing optionally substituted alkyl, cycloalkyl or aryl radicals, or R.sup.2 and R.sup.3 together form with the nitrogen atom a 5- or 6-membered nitrogen-containing heterocyclic ring.

Abstract: The disperse monoazo dyestuffs, free from sulphonic acid groups, which are of the formula: ##STR1## wherein X is hydrogen, alkyl, substituted alkyl, aryl, substituted aryl, --NR.sup.1 R.sup.2, --SR.sub.3, chlorine, bromine --OR.sup.3 or --SO.sub.2 R.sup.3 ;Z is hydrogen, alkyl, substituted alkyl, aryl or substituted aryl;Y is hydrogen, nitro, cyano, --COOR.sup.3, --COR.sup.3, --CONR.sup.1 R.sup.2, --SO.sub.2 R.sup.3 or --SO.sub.2 NR.sup.1 R.sup.2 ;E is the residue of a coupling component;R.sup.1 is hydrogen, alkyl or aryl;R.sup.2 is hydrogen or alkyl; andR.sup.3 is alkyl or aryl,A process for the manufacture of the said dyestuffs, and their use for coloring synthetic textile materials.