The poor quality first: disc, CD, burn too fast, light aging.
第一：刻盘：光碟质量太差，刻录速度太快，光驱老化。
Aging of paper and its mechanism under different light sources were discussed.
讨论了光对纸的老化作用及其机理。
Superior clear, UV light test and aging test can reach level 4.5
极高的透明度，耐黄及老化测试均可达4.5级以上。
Superior clear, UV light test and aging test can reach level 4.5
极高的透明度，耐黄及老化测试均可达4.5级以上。
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