US 12,459,159 B2
Method for producing colored wood
Kenji Mori, Osaka (JP)
Assigned to Panasonic Intellectual Property Management Co., Ltd., Osaka (JP)
Appl. No. 18/273,570
Filed by Panasonic Intellectual Property Management Co., Ltd., Osaka (JP)
PCT Filed Jan. 24, 2022, PCT No. PCT/JP2022/002351
§ 371(c)(1), (2) Date Jul. 21, 2023,
PCT Pub. No. WO2022/163565, PCT Pub. Date Aug. 4, 2022.
Claims priority of application No. 2021-010556 (JP), filed on Jan. 26, 2021.
Prior Publication US 2024/0091981 A1, Mar. 21, 2024
Int. Cl. B27K 5/02 (2006.01); B27K 3/36 (2006.01)
CPC B27K 5/02 (2013.01) [B27K 3/36 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A method for producing colored wood, the method comprising:
impregnating a block of wood with an organic acid aqueous solution containing an organic acid, wherein the wood is artificially dried wood, a moisture content of the artificially dried wood is 7% to 25%, and the moisture content of the wood is measured in accordance with the Japanese Industrial Standard JIS Z2101; and
performing steam treatment at a temperature and a pressure on the block of wood in a wet state of being impregnated with the organic acid aqueous solution while keeping the block of wood in the wet state,
wherein, in the steam treatment, the temperature is 110° C. or more and 160° C. or less and the pressure is a saturated steam pressure at the temperature, and
wherein a thickness of the wood is 10 mm or more and 40 mm or less.