检测不连续性，如裂纹、搭接、气孔、冷隔、粘结不良和类似缺陷。由于检查可以在正常光线下进行，因此当荧光渗透检测不可行时，可以使用这种方法。

Detection of discontinuities such as cracks, laps, porosity, cold shuts, lack of bond, and similar defects. Because inspection can be performed in normal light, this method can be used when fluorescent penetrant inspection is impracticable.