Tissue paper and tissue products Part 16: Determination of optical properties - Diffuse reflectance method for opacity (pap

Official government website of the Government of the Kingdom of Saudi Arabia

How to verify

Links to official Saudi websites end withgov.sa

All links to official websites of government agencies in the Kingdom of Saudi Arabia end with .gov.sa

Government websites use the HTTPS protocol for encryption and security.

Secure websites in the Kingdom of Saudi Arabia use the HTTPS protocol for encryption.

Number

2026/82
Issue date

02-04-2026
Expiration date

01-06-2026
Status

Finished

Description

This document specifies the testing procedures for the instrumental determination of the opacity of tissue paper or tissue products by diffuse reflectance using a paper backing.

This document contains specific instructions for the preparation of test pieces of single-ply and multi-ply products, where special preparation/procedures might be necessary.

It can be used to determine the opacity of tissue paper and tissue products containing fluorescent whitening agents, provided the UV content of the radiation incident on the test piece has been adjusted to conform to that in the CIE illuminant C using a fluorescent reference standard provided by an authorized laboratory as described in ISO 2470-1.

International reference number

ISO 12625-16:2024

Project type

Adoption