| 摘要 |
PROBLEM TO BE SOLVED: To enable an agent to effectively seep into the depth of a wood from microholes by forming a specified number of microholes with a specific aperture area and a specific depth per a specified surface area of the wood. SOLUTION: Microholes 1 are formed by squashing the surface 2 of a wood by compression using an incising blade. In this case, the microholes 1 are about 5-20 mm long and has 2.0-20 mm2 aperture area and further, the width of the microholes 1 is appropriately decided based on the length and aperture area of the microhole 1. Further, the depth of the microholes 1 is 2-20 mm and the number of the microholes 1 per 900 mm2 surface area 2 of the wood is limited to 1-10 pcs. In addition, the microholes 1 are arranged at a specified longitudinal interval P1 in the longitudinal direction and at a specified transverse interval P2 in the transverse direction. The mutually adjacent microholes 1, 1 in the transverse direction are arranged deviated from each other by a specified interval P3 in the longitudinal direction. Thus it is possible to effectively make an agent penetrate deep into the wood from the microholes 1.
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