PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR

**Definition:** This place covers:

Methods and apparatus for the following treatments of wood:

Methods and apparatus for bleaching or impregnating wood in combination with drying;

Methods and apparatus for chemical or physical treatment of cork;

Methods and apparatus for chemical or physical treatment of cane, reed, straw, bamboo or similar fibrous material of plant origin;

Selection (i.e. use) of chemical substances for the treatments covered by this subclass, unless provided for in other subclasses.

**Limiting references (this place does not cover):** - Biocidal compositions -> A01N - Fire-extinguishing compositions -> A62D1/00 - Coating wood -> B05D7/06 - Planing, drilling, milling, or turning wood -> B27C - Mechanical working of veneer or plywood -> B27D - Applying adhesives or glue to surfaces of wood to be joined -> B27G11/00 - Bending wood -> B27H1/00 - Mechanical working of cane, cork, or of tree or plant material not otherwise provided for -> B27J - Debarking, splitting wood, manufacture of veneer, wooden sticks, wood shavings, chips, powder, or the like -> B27L - Compressing, punching out, burning or charring wood -> B27M1/00 - Manufacture or reconditioning of specific semi-finished or finished wood articles -> B27M3/00 - Manufacture of articles made by dry processes from particles or fibres consisting of wood or other lignocellulosic or like organic material; after-treatment of these articles -> B27N - Impregnation of stoppers for bottles, jars, or similar containers -> B67B1/03 - Impregnation of matches -> C06F - Water repellent compositions of oils, fats or waxes or of derivatives thereof -> C08L91/00 - Woodstains -> C09D15/00 - Drying-oils, siccatives -> C09F - Fireproofing materials -> C09K21/00 - Paper-pulp impregnation -> D21H - Impregnation and after-treatment of fibreboard manufactured by wet processes -> D21J - Protection of building elements, e.g. against pests or fire -> E04B1/62 - Drying solid materials -> F26B - Treatment of materials for manufacturing musical instruments -> G10D

**Glossary:** - Dampening: Treating wood for increasing its water content (e.g. by steaming) - Dyeing: Treating a material with a soluble colouring substance that has an affinity to the material to which it is applied (as opposed to colouring with a pigment, which is usually insoluble) - Impregnation: Incorporation of a substance into the pores of a material by absorption, adsorption or penetration - OSB: Oriented strand board - Staining: Treating a surface with a paint that is formulated to transport the pigment into the pores of the surface, rather than creating a film on top of the surface - Thermal treatment: Treatment of wood at temperatures well over 100°C allowing for the modification of its chemical structure - Wood: Natural whole wood, or wood-based products other than those made from fibres or particles, for example plywood or laminated veneer lumber