Sonaca Wichita verifies the integrity of a product without destroying the product itself – an essential function in the construction of wing skins. Fluorescent dye penetrant is used to test wing skins for flaws not visible to the naked eye. The process begins with the application of penetrant, which is a fluorescent liquid. Any discontinuity open to the surface of the material will draw the liquid into the flawed area. After a developer is applied, even the slightest imperfections are visible under a black light.
