D-70 Nonaqueous Developer, Form D & E

Type: I, II

Method: A, B, C, D

Form: D & E

D-70 is nonaqueous developer consisting of an absorbent powder suspended in a volatile solvent. It is applied after the surface penetrant has been removed and the inspection surface dried. The developer particles will settle out upon standing, requiring agitation prior to application. The solvent action of this type of developer helps bring the penetrant to the surface enhancing the detectability of the finest flaws. This type of developer uses flammable solvents and should not be used in confined spaces or near open flames or sparks.


  • Weld inspection in ship building and weld repairs.
  • Heat exchanger inspection,  in what is called the through leak method where penetrant is applied to one side and the D-70 to the other.
  • Automotive inspection in locating oil and gas leaks in engine components and hydraulic lines.
  • 3D laser scanning to reduce interference glare from shinier surfaces.
  • Installation of aircraft doors as a marker for fit adjustments.


Product Data Sheet: Download

Safety Data Sheet: email info@met-l-chek.com

Certified to SAE AMS 2644 and on the Qualified Parts List.

Approvals: AMS-2644 and is AMS 2647, ASTM E-165, ASTM E-1417, ASTM E1418, ASME B&PVC Section V, NAVSEA 250-1500, MIL-STD-2132, T9074-AS-G1B-010/271, Boeing BSS 7039 & BAC 20-20-02, RCC-M edition 2000, Velan PS-008, Pratt & Whitney FPM PMC #4357-AG, General Electric Gas Turbines LM6000 PC & Aircraft Engines 70-32-02, Rolls-Royce CSS 232, RRP 58003C (aerosol only M250-C20), Safran IN-5000c; Snecma sensibilité S2, S3, & S4, ISO/FDIS 3452-2006 and EN 571-3*, and Flowserve approved.

It is low in Sulfur, Sodium, Chlorine, Fluorine and other Halogens, making it safe for use on Titanium and high Nickel alloys found in aerospace, medical and nuclear components.