GB/T 12967.6-2008
铝及铝合金阳极氧化膜检测方法.第6部分:目视观察法检验着色阳极氧化膜色差和外观质量
Test Methods for anodic oxidation coatings of aluminium and aluminium alloys.Part 6: Determination of color differences and appearance of colored anodic oxide films by viewing method
GBT12967.6-2008, GB12967.6-2008