Fluorescent Penetrant Inspection Materials And Methods

Author:  Switzer, Joseph L. et al
Source:  US Patent 2,920,203
Doc ID:  1960003
Year of Publication:  1960
Abstract:  
This invention relates to improvements in materials and methods for the non-destructive testing of materials, pieces, parts, or structures (also hereinafter referred to as "test bodies") for subsurface flaws having surface openings. More particularly, this invention relates to improvements in fluorescent penetrants and penetrant inspection methods for testing test bodies.