Download or read book GB T 40278 2021 Translated English of Chinese Standard GBT40278 2021 written by https://www.chinesestandard.net and published by www.ChineseStandard.net. This book was released on 2021-09-03 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt: This Standard specifies the test method for accelerated ageing of paper and board exposed to high light irradiance conditions, and predicts the effect of light ageing process on paper stability under natural conditions by evaluating the effect of ageing treatment on the optical properties of paper. This Standard applies to all kinds of white or nearly white paper and board.