BS EN ISO 12706:2001 – This is an uncontrolled copy. Ensure use of the most current version of this document by searching British Standards Online at bsonline.techindex.co.uk

2 Definitions
2.1 background L evel of fluorescent penetrant or colour contrast penetrant left on the surface of the component after the removal of excess penetrant.
2.2 bath Quantity of liquid-penetrant inspection materials (penetrant, emulsifier, developer) into which parts are immersed during the test.
2.3 bleedout Egress of penetrant from a discontinuity, usually aided by developer.
2.4 colour contrast penetrant Penetrant that is a solution of dyes (typically red) in a liquid base.
2.5 developer Substance which has the property of with-drawing penetrant from discontinuities to make them more easily visible.
2.6 development time Time between application of developer and subsequent examination
2.7 dip rinse Means of removing excess penetrant in which the test parts are dipped into a tank of water which may be agitated.
2.8 dry developer Developer in the form of a fine dry powder used mainly with fluorescent penetrants.
2.9 dual purpose penetrant Penetrant that gives indications which are capable of being viewed either under visible light or UV-A-radiation.
2.10 electrostatic spraying Application of electrically charged particles to an earthed test surface.
2.11 emulsifcation of penetrant Action of emulsifiers on post emulsifiable pene- trants to render them water-washable.
2.12 emulsifcation time Period of time that an emulsifier is used to render the post-emulsifiable penetrant water-washable.
BS EN ISO 12706:2001 – This is an uncontrolled copy. Ensure use of the most current version of this document by searching British Standards Online at bsonline.techindex.co.uk