The Penetrant Professor is an playfully chatty, occasional publication of Met-L-Chek®.

• Pump Sprayer vs. Aerosol Cans

• New Qualifications (2015)

• Semantics & Auditors

• Meeting Updates from 9/17

• Round Robin Testing for Accuracy

• Water Content – Karl Fischer Method
• Analysis Requirements
• Guidelines for Indicators

• Aerosol Particle Concentration

• TAM Panels
• NADCAP & ASTM E1417
• VOTE!
• NADCAP Influence

• Met-L-Chek Opinion
• Auditor vs. Contractor
• MIL-I-25135, AMS 2644
• ASTM E1417 & D-95 Testing

• Consistency, Contamination
• Consistency, Contamination

• Numbering System
• On Tanks

• USAF Materials Lab Testing
• Points by Blueline NDT

• Battery Powered, Intensity
• UV Blocking Glasses, UV & White Light
• Papers – USAF & Materials Evaluation
• ASTM E-1417 & E-1135 Requirements
• Technical Requirements
• What You NEED To Know

• Choosing A Cleaner
• Guide To Cleaning

• Horror Stories & Good Practice

• ASME PV&B, AMS 2647, TAM Panel

• Limitations of the Inspector
• NASA STD 5009 & PoD

• Soluble/Suspendible Concentrations
• Soluble/Suspendible Concentrations
• Effects on Indications
• Brightness Differences
• Proper Handling
• Wet v. Dry Spray
• Type I & II
• Application Time
• Proper Use

• Application & Variables
• Dry Powder Developer
• Thickness, De-Wetting

• Concentration Effects

• Calibrated Refractometer
• ASTM E-1417 Requirements
• Making A Bath/Custom Graph
• Making A Graph
• Water Pre-Rinse
• Periodic Testing

• • Makeup & Care
  • Frequency of Recording
  • Concentration: QPL, Pratt & Whitney, ASTM E-1417
  • Refractometer, Graph, Concentration
  • Brix Scale, Over/Under Concentration
  • AMS 2647 & ASTM E1417 Requirements

• Problems With/Without Dissasembly

• Defined, D93, ISO 2719

• Inspection Process & Safety

• MSDS, OSHA, NFPA, HMIS, DOT, WHMIS

• From MIL-I-25135 to AMS 2644
• 2016 Meeting Updates: ASNT, AMS, NDTMA, A4A, WCNDT, ISO, NADCAP

• Aerospace Engine Inspection

• Kermit Skeie & Others

• Thixotropic, Dual Purpose, Reverse Fluorescence, Felt Tipped & Peelable

• Changing from Visible to Fluorescent

• Preparation – George Hopman

• Affiliate in Europe

• Iowa State Univ. – Using Older Penetrants
• Trust Met-L-Chek

• UV Blocking Glasses, UV & White Light

• Penetrant Tank Life

• Dwell Times
• Sensitivity
• Dwell Times

• AMS 2644

• Sandia Labs Investigation
• Effects of Heat Fade
• FAA & Iowa State – Study
• Other Methods of Measuring
• Development of ASTM E-1135

• Different PT inspections on the Same Part

• Sources

• Penetrant Disposal – Environment & Public Treatment Works

• Glass Experiment

• Verifying Indications per ASTM E-1417

• Painting After a PT Test

• Can You Mix Penetrants?

• What Does the (M) Stand For?

• Back to Basics

• Not Allowed

• Measuring
• Spray, Brush, Immerse …
• Dwell Time & Draining
• Method A vs. Method D

• Immersion Washing

• Cold Weather Effects
• Low & High Temperatures

• PoD’s – Brian McCraken
• PoD’s – George Hopman

• Converting PPM – %
• Answering an Auditor

• Draining & PVC Pipes

• AMS 2644 – Form b & Form c

• NADCAP & Charts

• Does Roughness Affect Sensitivity?

• Defined
• Re-certifying & Extending

• TAM Panels, psi,% Brix

• Then & Now

• George Hopman – It’s Limitations
• Pratt & Whitney
• Known Defect Standard?
• Hoffman Panel

• What is Tank Life?

• Sensitivity

• Fluid oz vs. Weight oz
• Units & Labels

• Guide to Waste Water Treatment

• ASTM E-1417
• Karl Fischer, ASTM D-95
• AMS 2647
• Volume % vs. Weight %
• Over 5% Limit
• Post Emulsifiable Penetrants
• ASTM E-1417 Wording
• NADCAP Response

• Is Water Washable Water Based?

• Can You Increase Sensitivity?