Download or read book GB T 42999 2023 Translated English of Chinese Standard GB T 42999 2023 GBT42999 2023 written by https://www.chinesestandard.net and published by https://www.chinesestandard.net. This book was released on 2023-11-28 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt: This document describes the test method for determination of the light blocking effect to fabric using an illuminometer. This document applies to home textile fabrics and their products.