mittepurustava kontrolli meetod, mille korral ferromagnetilised osakesed kantakse enne magnetiseerimist katsetatava objekti pinnale vedeliku suspesioonina/lobrina (vt magnetlobrikatse; vrd magnetkuivpulberkatsetus), testing with magnetic particles being suspended in a substance such as water or oil and deposited onto surface of test object as the item is magnetized (see: magnet slurry test; compare: magnetic dry particles testing)