Dye solution indicates extent of cracking by penetrating crack and showing original crack depth clearly. Solution comprised of methylene blue in denatured ethyl alcohol penetrates cracks completely and evaporates quickly and is suitable technique for usage in environmental or structural tests.
Inspecting cracks in foam insulation
NASA Tech Briefs ; 4 , 1
1979-08-01
Sonstige
Keine Angabe
Englisch
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