PROBLEM TO BE SOLVED: To provide a virus removal method which can be used in finishing of an indoor wall surface in house construction, and is excellent in virus removal performance, and to provide a coating composition for forming a virus removal coated film and a coated film which are excellent in virus removal performance.SOLUTION: A virus removal method uses a coated film formed by applying a coating composition containing powder of a plant belonging to the family Juncaceae and a coated film forming resin onto a coated matter. The virus removal method includes a step of irradiating a coated film containing powder of a plant belonging to the family Juncaceae with light, where the light irradiating the coated film has a wavelength of 350 to 800 nm. In the virus removal method, a content of the plant belonging to the family Juncaceae in the coated film containing the powder of the plant belonging to the family Juncaceae is 30 parts or more with respect to 100 parts of the volume of the coated film containing the powder of the plant belonging to the family Juncaceae. In the virus removal method, the plant belonging to the family Juncaceae is selected from the family Juncaceae, Juncus leschenaultii, Juncus tenuis, Juncus effusus and Luzula capitata.SELECTED DRAWING: NoneCOPYRIGHT: (C)2017,JPO&INPIT【課題】住宅建築における室内壁面の仕上げに使用でき、かつ、ウィルス除去性能に優れたウィルス除去方法、並びに、ウィルス除去性能に優れたウィルス除去塗膜形成用塗料組成物及び塗膜の提供。【解決手段】イグサ科植物の粉末及び塗膜形成樹脂を含む塗料組成物を被塗物に塗布することにより形成される塗膜による、ウィルス除去方法。イグサ科植物の粉末を含有する塗膜に光を照射する工程を含み、塗膜に照射する光が、波長350~800nmである、ウィルス除去方法。前記イグサ科植物の粉末を含有する塗膜におけるイグサ科植物の含有量が、イグサ科植物の粉末を含有する塗膜の体積100部に対し30部以上である、ウィルス除去方法。イグサ科植物は、イグサ、コウガイゼキショウ、クサイ、ラセンイおよびスズメノヤリから選択される、ウィルス除去方法。【選択図】なし
