Liquid Penetrant Testing

close up of hands holding a part, glowing under a black lightLiquid Penetrant Testing is a nondestructive (NDT) method of detecting surface flaws and defects. Parts are submerged in a fluorescent penetrant solution, soaked long enough for the liquid to infiltrate any potential cracks or flaws, and then the solution is rinsed off. Fluorescent penetrant will remain in any surface flaws and will be discovered through inspection under ultraviolet light.

Skills Inc. has three Penetrant Testing processing lines located at our Plant 1 facility in Auburn, WA. We partner with leading aerospace and commercial manufacturers to provide the below processes.


  • Type 1, Method A & C, Sensitivity Level 2 & 3
  • All inspection personnel certified to current revision of NAS410
  • ASNT & NAS410 certified NDT PT Levell III on staff full time Mon-Fri
  • NADCAP Accredited
  • AS9100 Certified
  • Inspection of parts up to 20 feet long

Approved for the following process specifications:

PenetrantBSS7039 & BAC5423D1-4426
PenetrantDPS 4.707D1-4426

Pre-Clean Tank Dimensions

Tank No.ProcessLengthWidthDepth
100Emulsion Clean264″40″59″
200Alkaline Clean264″40″60″
210Emulsion Clean96″36″48″
213Alkaline Clean96″36″48″
214Alkaline Clean96″36″48″