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ZP-4D is a dry powder developer for form A penetrant testing that is ideal for highly sensitive fluorescent penetrant processes. ZP-4D is applied to oven dried parts following the use of penetrants and forms a thin film on parts that enhances the visibility of ultra-fine discontinuities.
ZP-4D is listed on the QPL SAE AMS 2644 Qualified Product List and is approved for use by Pratt & Whitney.
NDT TypeFluorescent Penetrant Testing
Penetrant TypeType 1
Penetrant MethodsALL, Method A, Method B, Method C, Method D
Developer FormForm a
Ideal ApplicationCracks, Forgings, Porosity, Seams, Welds
Defect ExamplesCastings, Critical components, Turbine components
StandardsAECL, AMS 2644, AMS 2647, ASME, ASTM E1417, Boeing BAC 5423 PSD 6-46 or 8-4, Boeing PS-21202, GE P3TF2, Honeywell EMS 52309, ISO 3452-2, Pratt & Whitney PMC 4356, QPL SAE AMS 2644
Level 1 water washable fluorescent penetrant for Type 1, Method A and Method C liquid penetrant testing, QPL SAE AMS 2644 approved
Level 2 water washable fluorescent penetrant for Type 1, Method A and Method C penetrant testing, QPL SAE AMS 2644 and Pratt & Whitney approved
Level 3 water washable fluorescent penetrant for Type 1, Method A and Method C penetrant testing, QPL SAE AMS 2644 and Pratt & Whitney approved
Level 4 water washable fluorescent penetrant for Type 1, Method A and Method C liquid penetrant testing, QPL SAE AMS 2644
Water suspendible developer for Form c penetrant testing, QPL SAE AMS 2644
LED UV lamps and black lights for non-destructive testing
Portable, handheld LED UV lamp for black light inspection during fluorescent PT or MT testing
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