Main informations

Collections

International ISO standards

Publication date

December 2015

Number of pages

6 p.

Reference

ISO 6271:2015

ICS Codes

87.060.20 Binders

Print number

1

Sumary

Clear liquids - Estimation of colour by the platinum-cobalt colour scale

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".

Replaced standards (2)

ISO 6271-1:2004

November 2004

International standard Cancelled

Clear liquids - Estimation of colour by the platinum-cobalt scale - Part 1 : visual method

ISO 6271-1:2004 specifies a method for estimating the colour, in Pt-Co units, of clear liquids. It is applicable to clear liquids having colour characteristics similar to those of the reference platinum-cobalt scale.

ISO 6271-2:2004

November 2004

International standard Cancelled

Clear liquids - Estimation of colour by the platinum-cobalt scale - Part 2 : spectrophotometric method

ISO 6271-2:2004 specifies a spectrophotometric method for estimating the colour, in Pt-Co units, of clear liquids. It is applicable to clear liquids having a colour characteristic similar to those of the reference platinum-cobalt scale specified in ISO 6271-1, which describes a visual method. The method described provides a more precise way of measuring Pt-Co colour than that described in ISO 6271-1.

Standard replaced by (2)

ISO 6271-1:2004

November 2004

International standard Cancelled

Clear liquids - Estimation of colour by the platinum-cobalt scale - Part 1 : visual method

ISO 6271-1:2004 specifies a method for estimating the colour, in Pt-Co units, of clear liquids. It is applicable to clear liquids having colour characteristics similar to those of the reference platinum-cobalt scale.

ISO 6271-2:2004

November 2004

International standard Cancelled

Clear liquids - Estimation of colour by the platinum-cobalt scale - Part 2 : spectrophotometric method

ISO 6271-2:2004 specifies a spectrophotometric method for estimating the colour, in Pt-Co units, of clear liquids. It is applicable to clear liquids having a colour characteristic similar to those of the reference platinum-cobalt scale specified in ISO 6271-1, which describes a visual method. The method described provides a more precise way of measuring Pt-Co colour than that described in ISO 6271-1.

ZOOM ON ... the Requirements department

To comply with a standard, you need to quickly understand its issues in order to determine its impact on your activity.

The Requirements department helps you quickly locate within the normative text:
- mandatory clauses to satisfy,
- non-essential but useful clauses to know, such as permissions and recommendations.

The identification of these types of clauses is based on the document “ISO / IEC Directives, Part 2 - Principles and rules of structure and drafting of ISO documents ”as well as on a constantly enriched list of verbal forms.

With Requirements, quickly access the main part of the normative text!

With Requirements, quickly access the main part of the normative text!

Need to identify, monitor and decipher standards?

COBAZ is the simple and effective solution to meet the normative needs related to your activity, in France and abroad.

Available by subscription, CObaz is THE modular solution to compose according to your needs today and tomorrow. Quickly discover CObaz!

Request your free, no-obligation live demo

I discover COBAZ