WOOD BLEACHING PROCESS

woodworking. SUBSTANCE: wood colored by fungal pigments or darkened from atmospheric or solar effects is bleached in two steps. Wood is first treated with aqueous solution containing 25-55% sodium hypochlorite, 1-5% sodium or potassium hydroxide, and water. In the second step, treatment is carried o...

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Bibliographische Detailangaben
Hauptverfasser:	MAKSIMOV S.I, DENISKIN V.V, MASLOV V.A, KHOFBAUEHR EH.I, RAKHMANOV A.A
Format:	Patent
Sprache:	eng
Schlagworte:	BLEACHING LEATHER OR FURS CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW ORSIMILAR MATERIALS DRY-CLEANING, WASHING OR BLEACHING FIBRES, FILAMENTS, THREADS,YARNS, FABRICS, FEATHERS OR MADE-UP FIBROUS GOODS FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR LAUNDERING NAILING OR STAPLING MACHINES IN GENERAL PERFORMING OPERATIONS PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FORIMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILARMATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITHPERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR TEXTILES TRANSPORTING TREATMENT OF TEXTILES OR THE LIKE WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL
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Beschreibung
Zusammenfassung:	woodworking. SUBSTANCE: wood colored by fungal pigments or darkened from atmospheric or solar effects is bleached in two steps. Wood is first treated with aqueous solution containing 25-55% sodium hypochlorite, 1-5% sodium or potassium hydroxide, and water. In the second step, treatment is carried out with 15- 50% aqueous solution of hydrogen peroxide. EFFECT: achieved complete restoration of damaged wood surface regions. 3 cl, 5 ex