Abstract: Process for forming an image on a substrate comprising applying an ink thereto by means of an ink-jet printer wherein the ink comprises a liquid medium and a phthalocyanine dye fraction obtainable by the fractionation of a solution and/or suspension of a mixture of phthalocyanine dyes of Formula (1), and salts thereof, by cross-flow filtration: wherein: M is 2H, copper or nickel; Pc represents a phthalocyanine nucleus; R1 and R3 independently are H or optionally substituted C1-4alkyl; R2 and R4 independently are H or optionally substituted hydrocarbyl; or R1 and R2, and, R3 and R4, independently, together with the nitrogen atom to which they are attached represent an optionally substituted aliphatic or aromatic ring system; x is 0 to 3.9; y is 0 to 3.9; z is 0.1 to 4; and the sum of (x+y+z) is 2.4 to 4.5.

Abstract: A composition comprising: a) 0.1 to 30 parts of colorant; b) 0.1 to 20 parts of a compound of Formula (1): R1R2N—Ar—(SO3X)n  Formula (1) wherein: R1 is H, alkyl, cycloalkyl or aralkyl and R2 is alkyl, cycloalkyl or aralkyl; or R1 and R2, together with the N atom to which they are attached, form a 5- or 6-membered ring; Ar is phenylene or naphthylene; X is H or a cation; and n is 1 or 2; c) 1 to 40 parts of organic solvent; d) 0 to 20 parts of hydrotropic agent; e) 0 to 5 parts of biocide; f) 0 to 5 parts of surfactant; and g) 1 to 98.8 parts of water; wherein all parts are by weight and a)+b)+c)+d)+e)+f)+g) add up to 100. Also claimed are inks comprising these compositions, ink jet printer cartridges containing these inks, their use in ink jet printing especially where the temperature of application is greater than 30° C. and substrates printed with these compositions or inks.

Abstract: A composition for ink jet printing of a synthetic substrate comprising a disperse dyestuff having an average particle size of from 10 to 500 nm, a dispersant, water and a water-miscible co-solvent having a degree of polarity (&dgr;/MPa1/2) of from 4 to 14 at 25° C. such as ethyleneglycol, glycerol, 1,4-butanediol and resorcinol.

Abstract: A composition comprising: (a) a cationic substance; (b) an acid generator; and (c) an alkyl or a hydroxyalkyl substituted starch. Also claimed is a polyamide textile material treated with the composition, a method for ink jet printing onto a polyamide textile material which has been treated with the composition and a polyamide material printed using the method.

Abstract: A composition comprising: