D06LDRY-CLEANING, WASHING OR BLEACHING FIBRES, FILAMENTS, THREADS, YARNS, FABRICS, FEATHERS OR MADE-UP FIBROUS GOODSBLEACHING LEATHER OR FURSIn this subclass, the term "bleaching" also covers "optical bleaching".This subclass does not cover treatment of textiles by purely mechanical means, which is covered by subclasses D06B, D06C or D06F. D06L1/00 D06L1/00Dry-cleaning or washing fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods D06L1/01using only solid or pasty agents D06L1/02using organic solvents D06L1/04combined with specific additives D06L1/06 takes precedence D06L1/06De-sizing D06L1/08Multi-step processes D06L1/10Regeneration of used chemical baths D06L1/12using aqueous solvents D06L1/14De-sizing D06L1/16Multi-step processes D06L1/18Working under pressure in closed vessels D06L1/20combined with mechanical means D06L1/22Processes involving successive treatments with aqueous and organic agents D06L4/00Bleaching fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goodsBleaching leather or furs D06L4/10using agents which develop oxygen D06L4/20 takes precedence D06L4/12combined with specific additives D06L4/13using inorganic agents D06L4/15using organic agents D06L4/17in an inert solvent D06L4/18in a gaseous environment D06L4/20using agents which contain halogen D06L4/21combined with specific additives D06L4/24 takes precedence D06L4/22using inorganic agents D06L4/23using hypohalogenites D06L4/24using chlorites or chlorine dioxide D06L4/26combined with specific additives D06L4/27using organic agents D06L4/28in an inert solvent D06L4/24 takes precedence D06L4/29in a gaseous environment D06L4/24 takes precedence D06L4/30using reducing agents D06L4/40using enzymes D06L4/50by irradiation or ozonisation D06L4/60Optical bleaching or brightening D06L4/607in organic solvents D06L4/614in aqueous solvents D06L4/621with anionic brighteners D06L4/629with cationic brighteners D06L4/636with disperse brighteners D06L4/643wherein the brightener is introduced in a gaseous environment or in solid phase, e.g. by transfer, by use of powders or by use of super-critical fluids D06L4/65with mixtures of optical brighteners D06L4/657combined with other treatments, e.g. finishing, bleaching, softening, dyeing or pigment printing D06L4/664Preparations of optical brightenersOptical brighteners in aerosol formPhysical treatment of optical brighteners D06L4/671Optical brightening assistants, e.g. enhancers or boosters D06L4/679Fixing treatments in optical brightening, e.g. heating, steaming or acid shock D06L4/686Fugitive optical brighteningDischarge of optical brighteners in discharge pasteBlueingDifferential optical brightening D06L4/693Blueing with mixtures of dyesBlueing with mixtures of dyes and optical brighteners D06L4/70Multi-step processes D06L4/75combined with cleaning or washing