Abstract: Benzodifurantriones of Formula (1): ##STR1## in which W is unsubstituted or substituted aryl, a process for their preparation via dioxo intermediates and processes for their conversion into benzodifuranone dyes and compounds of Formula (7): ##STR2## are provided wherein R.sup.3 is --H, --COR.sup.2, --SO.sub.2 R.sup.2 -- which R.sup.2 is alkyl, cycloalkyl, aryl or aralkyl and R.sup.4 is --COOR.sup.2, --CONRR.sup.1 in which R and R.sup.1 each independently is --H, alkyl, cycloalkyl, aryl or aralkyl; --COOH or the alkali metal, alkaline earth metal or ammonium salts thereof; or --COX.sup.2 -- which X.sup.2 is halo.

Abstract: Substituted 2,6-dioxo-2,6-dihydrobenzo[1:2-b, 4:5-b']difurans or -dipyrroles and processes for their manufacture. The compounds are dyestuffs which are particularly useful in the form of aqueous dispersions for application to polyester textile materials.

Abstract: Substituted 2,6-dioxo-2,6-dihydrobenzo[1:2-b, 4:5-b.sup.1 ]difurans or -dipyrroles and processes for their manufacture. The compounds are dyestuffs which are particularly useful in the form of aqueous dispersions for application to polyester textile materials.

Abstract: Process for mass coloring synthetic linear polyesters which comprises incorporating into the preformed polyester one or more dyestuffs of the formulae:- ##STR1## wherein R is a group of the formula ##STR2## and X is a lower alkoxy, substituted lower alkoxy, lower alkylamino or acylamino radical which is free from hydroxy or carboxylic acid groups.

Abstract: Dyeing nylon by applying sulphonated or unsulphonated dyestuffs containing cyclic anhydride groups, anhydride forming dicarboxylic acid groups or half-esters or half-amides thereof, as free acids or as salts with ammonia or volatile amines, and heating the fibre until dyestuff fixation takes place.

Abstract: Dyeing cellulose or cellulose/polyester blends by applying unsulphonated dyestuffs containing cyclic anhydride groups, anhydride-forming dicarboxylic acid groups or half-esters or half-amides thereof, as free acids or as salts with ammonia or volatile amines, and heating the fibre until dyestuff fixation takes place.