Post-emulsifiable fluorescent penetrants are used for a wide range of sensitive applications and are formulated to be impervious to water to assure against being over-washed from defects. They require the application of a lipophilic emulsifier or a hydrophilic emulsifier to render them washable with water and meet OSHA requirements for Class III B liquids due to their high flash point, allowing them to be used in open dip tanks.

Zyglo post-emulsifiable fluorescent penetrants fluoresce a bright greenish-yellow color under ultraviolet radiation. Use of a black light source with a peak wavelength of 365nm is required.

APPLICATIONS

ZL-2C (Level 2, Normal Sensitivity): Typically used on castings, forgings, extrusions and rough machined surfaces to find cracks, seams, laps, laminations and porosity.

ZL-27A (Level 3, High Sensitivity): Typically used on castings, forgings, extrusions and rough machined surfaces to find cracks, seams, laps, laminations and porosity.

ZL-37 (Level 4, Ultra-High Sensitivity): Ideal for titanium turbine components, investment castings and other high stress critical components where detection of fine, tight and broad open shallow discontinuities is required.