ISO 12625-7:2021 PDF

Scope: This document specifies testing procedures for the instrumental determination of brightness and colour of tissue paper and tissue products viewed under outdoor daylight conditions. It also gives specific instructions for the preparation of test pieces (single-ply, multi-ply products) and for the optical measurements of products, where special precautions can be necessary. NOTE The properties called ISO brightness and colour with C/2° (indoor daylight) are measured with an instrument adjusted to a much lower UV content than that specified in this document. The measurements of ISO brightness and colour with C/2° (indoor daylight) are described in ISO 12625-15.

ISO 12625-7:2021 Referenced Document

ISO 11475:2017 Paper and board - Determination of CIE whiteness, D65/10 degrees (outdoor daylight)
ISO 186 Paper and board - Sampling to determine average quality
ISO 187 Paper, board and pulps; standard atmosphere for conditioning and testing and procedure for monitoring the atmosphere and conditioning of samples*， 2022-01-01 Update
ISO 2469 Paper, board and pulps*， 2024-03-01 Update
ISO 4094 Paper, board and pulps - General requirements for the competence of laboratories authorized for the issue of optical reference transfer standards of level 3
ISO/CIE 11664-4 Colorimetry — Part 4: CIE 1976 L*a*b* colour space

2021 ISO 12625-7:2021 Tissue paper and tissue products — Part 7: Determination of optical properties — Measurement of brightness and colour with D65/10° (outdoor daylight)
2014 ISO 12625-7:2014 Tissue paper and tissue products - Part 7: Determination of optical properties - Measurement of brightness and colour with D65/10° (outdoor daylight)
2007 ISO 12625-7:2007 Tissue paper and tissue products - Part 7: Determination of optical properties