Post emulsifiable penetrants require a separate emulsifier or remover to break the penetrant down so the excess penetrant can be rinsed off with water, while the penetrant in the indication stays put. … Hydrophilic emulsifiers are water-based and supplied as a concentrate that must be diluted with water prior to use.

Which method of penetrant removal is post emulsifier hydrophilic?

Method D fluorescent penetrant inspection utilizes Hydrophilic Emulsifier to remove the surface penetrant. Hydrophilic Emulsifier is supplied as a concentrate by the manufacturer, and the hydrophilic emulsifier is diluted with water prior to use.

How do you get rid of extra penetrant?

The excess penetrant may be removed from the object surface with a simple water rinse. These materials have the property of forming relatively viscous gels upon contact with water, which results in the formation of gel-like plugs in surface openings.