The photographs show a solvent removable system. Experience showed that temperature and soak time were important. The information collected does not identify you directly, but it can give you a more personalized website experience. After adequate penetration time has been allowed, the excess penetrant is removed and a developer is applied. Notify me of new posts by email. You need to remove excess dye from the area, which is easier said than done.
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The Ultimate Guide to Visible Dye Penetrant Testing [Infographic]
When using non-aqueous wet developer NAWD or dry powder, the sample must be dried prior to application, while soluble and suspendable developers are applied with the part still wet from the previous step. Learn how liquid penetrant testing products lose performance over time and what to do to ensure penetrant test reliability. You can see the edges of the cleaned area showing a slight redness. Personal information opt-in flag Expiration: They needed to find a visible red penetrant system that met their technical requirements and that they could source locally. If there had been a hole in the weld it would have shown up very clearly as a pink-red spot.