Visible dye penetrant system

Details Visible dye penetrant system Visible dye penetrant system

G - Physics

01

N

150/4

G01N 21/91 (2006.01)

Patent

CA 1087967

ABSTRACT An improvement in liquid penetrant inspection techniques for detecting surface discontinuities wherein a liquid penetrant is applied to the surface to be tested so that it finds its way into discontinuities, excess penetrant is removed, and then a developer suspension is supplied to the surface to absorb pene- trant which has become lodged in surface discontinuities. The specific improvement of the present invention resides in using in the penetrant a compound which undergoes a color-forming reaction with solid particles contained in the developer suspension. The color-forming reaction renders the particles constrastingly visible to the background.

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