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 emulsifier and then a post-rinse.” There is an unanswered question a...
Here again, there is a lot of common sense involved. One should simply see that junk- oops, foreign material – does not get into the penetrant. But it does happen. There is the obvious poor practice of people throwing stuff i...
We do not know to what extent this subject is a problem for anyone in the USA, but it seems to have come up in Europe. There is a lot of common sense involved in this subject, and probably most, if not all, of our readers wil...
Indication Brightness In the last issue of this newsletter, we discussed the work being done at Iowa State University with regard to penetrant inspection. To reiterate the place where you can get all of the detailed informat...
This subject was discussed in our 2nd anniversary issue of the Penetrant Professor in 1995. Funny how time flies but the questions remain the same. Every penetrant manufacturer is asked about what temperature their penetrant ...
Another faithful reader and customer asked if there was an additive that could be used to facilitate the electrostatic spraying of penetrant. While the question was innocently made, the person either forget or did not underst...
AEROSOL SPRAYING Almost every inspector understands that in order to get good penetrant indications, it is necessary to apply a thin coating of developer. This is particularly true when the inspector uses form “d” nonaqueous ...
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