Reusable penetrant for penetrant inspection test and penetrant inspection test method using same

The present invention relates to a reusable penetrant for a penetrant test and a penetrant test method using the same, the penetrant for a penetrant test comprising 5-20 wt% of a base solvent, 0.1-1.1 wt% of an oil-soluble dye, and the balance being a dilution solvent, and more specifically, to a reusable penetrant for a penetrant test and to a penetrant test method using the same, the solubility of the base solvent and the dilution solvent in water at 20 DEG C is 0.1 wt% or less, and the oil-soluble dye does not dissolve in water even when mixed with water. The penetrating fluid for a penetrant test according to the present invention does not dissolve an oil-soluble dye in water even if the penetrating fluid is mixed with water, and enables oil-water separation by recovering a cleaning fluid containing an excess penetrating fluid generated by a penetrant test using the penetrating fluid. The oil layer is used as penetrating fluid, and the water layer is used as cleaning water to be repeatedly used for a pene