International Standard
ISO 6271:2015
Clear liquids — Estimation of colour by the platinum-cobalt colour scale
Reference number
ISO 6271:2015
Edition 3
2015-12
International Standard
Read sample
ISO 6271:2015
63300
Published (Edition 3, 2015)
This standard was last reviewed and confirmed in 2021. Therefore this version remains current.

ISO 6271:2015

ISO 6271:2015
63300
Language
Format
CHF 42
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Abstract



ISO 6271:2015 specifies a spectrophotometric method for estimating the colour of clear liquids in terms of platinum-cobalt units (Pt-Co units). It is applicable to clear liquids having a colour characteristic similar to those of the platinum-cobalt colour scale specified in Annex A. For products with colours more intense than the Pt-Co stock solution the method specified in ISO 4630 applies.

The spectrophotometric method provides a more precise way of measuring Pt-Co colour than a visual sample comparison by human eyes.

NOTE The term "Pt-Co colour" used here is preferred over the terms "Hazen colour" and "APHA colour".

General information

  •  : Published
     : 2015-12
    : International Standard confirmed [90.93]
  •  : 3
     : 6
  • ISO/TC 35
    87.060.20 
  • RSS updates

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