Accession Number : AD0164346

Title :   Process for Nondestructive Inspection.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE AIR FORCE WASHINGTON D C

Personal Author(s) : Allinikov,Sidney

Report Date : 17 OCT 1972

Pagination or Media Count : 5

Abstract : This invention is useful in that it permits the detection of weakly bonded or nonbonded portions of laminated articles. A substituted 1,3,3-trimethylindolinobenzopyrylospiran is mixed with an organic-soluble, resin base paint and applied to the surface of a laminated article. The coating is then activated by ultraviolet light which causes a color change. Upon heating, any portion of the coating directly over a weakly bonded or nonbonded portion of the laminated article will return to its original colorless or white state.

Descriptors :   *Patents, *Laminates, *Nondestructive testing, Spiro compounds, Defects(Materials), Detection, Inspection, Dyes, Oxygen heterocyclic compounds, Nitrogen heterocyclic compounds, Paints, Synthesis(Chemistry), Ultraviolet radiation

Subject Categories : Organic Chemistry
      Test Facilities, Equipment and Methods

Distribution Statement : APPROVED FOR PUBLIC RELEASE