PROBLEM TO BE SOLVED: To provide inhibitors for potential spots.SOLUTION: An inhibitor for potential spots contains a humic soil extract as an active ingredient, the humic soil extract being suitably obtained with a water based solvent. When the humic soil extract is dissolved or suspended in water so that the solid concentration is 0.5 mass%, the inhibitor for potential spots contains preferably 0.1-100 mg/L, more preferably 1-50 mg/L, and still more preferably 5-50 mg/L of fulvic acid.SELECTED DRAWING: NoneCOPYRIGHT: (C)2017,JPO&INPIT【課題】潜在しみの抑制剤の提供。【解決手段】腐植土抽出物を有効成分とする潜在しみ抑制剤。腐植土抽出物が、水系溶媒で得られるものが好適である潜在しみ抑制剤。前記腐植土抽出物が、固形分濃度が0.5質量%となるように水に溶解又は懸濁したときに、好ましくはフルボ酸を0.1~100mg/L、より好ましくは1~50mg/L、さらに好ましくは5~50mg/L含有する潜在しみ抑制剤。【選択図】なし
