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penetrant testing, which is typically red and uses a white developer to draw the dye back to the surface from inside the discontinuities by 'wicking' or capillary action, kapillaarkatse, mis kasutab punast värvi valgel taustal tõmmates punase värvi kapillaarse toime põhjal pinnale hälvingute seest
visible penetrant inspection . Materjalitehnika terminibaas. Estonian Language Institute, Sõnaveeb 2026. https://sonaveeb.ee/search/unif//mtr/visible%20penetrant%20inspection/1/eng (08.07.2026)