Mail Inbox - January 2012

Large parts: how to wash a fluorescent penetrant

January 2012

We have had an exchange of emails with a reader about a "very simple" question; obviously, a good question!

Question:

"When washing parts, some time ago, after using a water-washable (WW) Level 3 fluorescent penetrant, I wondered about the washing time.

Mail Inbox - December 2011

Excessive background vs Insufficient background (Overwashing)

December 2011

Further to our Mail Inbox of November 2011, titled "A too high fluorescent background brightness?" (Which criteria make it possible to claim that the fluorescent background is too high?), in which one of our readers told us that a NADCAP auditor has issued a Non-Compliance Report (NCR) due to a too high background?

Mail Inbox - November 2011

A too high fluorescent background brightness?

November 2011

A more-than-thirty year friend of ours, who has been a Level 3 trainee with us as instructors, in the ‘80s, Claude BOURIGEAUD, a consultant engineer in ASSISTEC-CB, sent us the underneath question:
"Which criteria make it possible to claim that the fluorescent background is too high?

A Non-Compliance Report (NCR) has been issued by a NADCAP auditor on this topic, up to now failing to give us “true criteria"; he presented us with subjective criteria only.
Can someone shed some light on it? (UV light, for a better understanding?)
Thank you. Sincerely yours."

Mail Inbox - Editorial April 2011

Capillary pressure

October 2011

In December 2010 and January 2011, two readers from North America asked us almost the same question about the pattern of indications on Known Defects Standards (KDS) used in Penetrant Testing, during repeated tests.

A third question, on the same topic, made us write a paper published on our Website(*).