Continuous Magnetisation Technique

The continuous technique is a testing technique by which the magnetic ink or powder is applied before and during energisation and the test area is viewed whilst the magnetising force is applied.
This is always considered to be the most sensitive technique, whatever apparatus is used to magnetise, due to the fact that the induced magnetic field is always the strongest whilst the magnetising force is being applied. When AC energised equipment is employed this technique is always used. When utilising this technique of testing, application of detecting media should be avoided post energisation due to the tendency of small/weak indications being washed away, particularly when AC energisation is applied.