Non Destructive Testing
A variety of fluorescent and non fluorescent dyes are internationally used in the coloration of non-destructive testing (NDT) or crack detection fluids. Keystone Fluorescent Yellow R, Solvent yellow 43 and Keyfluor White RWP, coumarin brightner, are the most popular dyes used for fluorescent non-destructive testing or crack detection fluids. Keystone offers a complete range of products for use in non-destructive testing (NDT) in both liquid and powder form.