Water Content: Karl Fisher versus ASTM D95
We are getting phone calls asking why we do not use ASTM D 95 to measure the water content of penetrants...
More About Emulsifiers and Charts
In our last issue, we pointed out that some auditors now require that the user make his or her own concentration...
Water Pre-rinse
ASTM E-1417 states (Paragraph 7.3.4.2) that “Hydrophilic post emulsifiable penetrant shall be removed with a water Pre-rinse, application of the hydrophilic...
What Do The Numbers On The Bottom Of The Can Mean
What Do the Numbers Mean We often get calls asking what the numbers mean on the bottom of the aerosol cans...
More Thoughts on POD’s and Penetrant Inspection
Our recent article about penetrant POD brought this response from Brian MacCracken, now retired, but an important figure in the penetrant...
Shelf Life vs Tank Life
We frequently get questions concerning the shelf life of our products. Shelf life is a term that can be defined differently...
Penetrant Viscosity
Penetrant Viscosity It is easy for some of us to speak about “old times” in the penetrant business. In the early...
Surface Roughness
We get a wide range of questions, from the sublime to the ridiculous. But we always understand that the question, no...
Hydrophilic Emulsifier
Hydrophilic Emulsifier We probably do not say enough times that the subjects that are addressed in this publication originate with those...
Understanding, Shades of Meaning, and Complete Obfuscation
We who work with specifications, such as ASTM E-1417, E-165, and the like are constantly reminded that it is important to...