| 摘要 |
PURPOSE: A teaching material for children is provided to increase the commercial property and the life expectancy of the material by preventing the transformation or the warpage of the teaching material due to wooden grain. CONSTITUTION: The paper grain of paper(11) are alternately laminated to obtain lamination(10). The wooden grain of patterned wood(20) and the paper grain of the paper are alternately arranged. The paper and the patterned wood are bonded using an adhesive. The thickness of the paper is constant. The patterned wood is arranged on both sides of the lamination. |
