| 摘要 |
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: None |
