DS/EN 1557:1997
Surface active agents - Colorimetric characterization of optically clear coloured liquids (products) as X, Y, Z tristimulus values in transmission

Standard No.

DS/EN 1557:1997

Release Date

1997

Published By

Danish Standards Foundation

Latest

DS/EN 1557:1997

Scope

The standard deals with colorimetric characterization of optically clear, slightly tinted liquids (products by broad-band measurement of pure transmittance with tristimulus value measuring filters as Tx, Ty and Tz (subscripts!). Since the filters of simple tristimulus colorimeters meet the Luther condition to a limited extent only it is necessary to deliberately restrict the liquids to slightly tinted ones in order to be able to measure them sufficiently exactly with a single calibration against uncoloured distilled water.

DS/EN 1557:1997 history

• 1997 DS/EN 1557:1997 Surface active agents - Colorimetric characterization of optically clear coloured liquids (products) as X, Y, Z tristimulus values in transmission