Abstract: Provided are a formaldehyde scavenger capable of providing excellent formaldehyde scavenging performance without discoloring a wood material and not reemitting formaldehyde, and a wood material using the same. The formaldehyde scavenger contains urea, ammonium phosphate monobasic and ammonium phosphate dibasic. The formaldehyde scavenger contains urea, ammonium phosphate monobasic and ammonium phosphate dibasic preferably in a weight ratio of urea/ammonium phosphate monobasic/ammonium phosphate dibasic in the range of 5 to 45/0.5 to 15/1 to 20, and further preferably in a weight ratio of urea/ammonium phosphate monobasic/ammonium phosphate dibasic in the range of 10 to 35/1 to 10/2 to 15. The wood material is prepared by applying the formaldehyde scavenger thereto. The formaldehyde scavenger is preferably applied in the range of 1 to 50 g/m2 by dry weight.

Abstract: Provided are a formaldehyde scavenger capable of providing excellent formaldehyde scavenging performance without discoloring a wood material and not reemitting formaldehyde, and a wood material using the same. The formaldehyde scavenger contains urea, ammonium phosphate monobasic and ammonium phosphate dibasic. The formaldehyde scavenger contains urea, ammonium phosphate monobasic and ammonium phosphate dibasic preferably in a weight ratio of urea/ammonium phosphate monobasic/ammonium phosphate dibasic in the range of 5 to 45/0.5 to 15/1 to 20, and further preferably in a weight ratio of urea/ammonium phosphate monobasic/ammonium phosphate dibasic in the range of 10 to 35/1 to 10/2 to 15. The wood material is prepared by applying the formaldehyde scavenger thereto. The formaldehyde scavenger is preferably applied in the range of 1 to 50 g/m2 by dry weight.

Abstract: The present device relates to a chair in which a base member is fitted onto an upper portion of a leg comprising a plurality of castors in contact with a floor together with support members for these castors, and a seat portion and a back rest are provided on an upper portion of a support plate that is capable of reclining with respect to the base member. This chair is also provided with a cam-shaped link capable of rotating about the periphery of a pin provided in the base member, an upper portion of the link protrudes towards the support plate side, and a corresponding elastic member that is compressed by the rotation of the link is provided in a bottom portion of the base member. A shaft portion in contact with the link, and which causes the link to change profile in response to the reclining action, is provided within the support plate. This configuration provides a chair that is inexpensive and can naturally adopt either a serious working position or a relaxed reclining position.