NASA NTRS · 19790000107
Inspecting cracks in foam insulation
Abstract
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.
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Cambell, L. W., Jung, G. K.. 1979-08-01. Inspecting cracks in foam insulation. https://ntrs.nasa.gov/citations/19790000107
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