ISO 2143规定了一种通过酸预处理后的染料吸收来估算经过密封处理的阳极氧化涂层吸收能力损失的方法。 该方法适用于生产控制方法，并适用于可能遭受风化或侵蚀性环境的阳极氧化涂层，或耐沾污性很重要的阳极氧化涂层。 该方法不适用于以下涂层: a） 在铜含量超过2%或硅含量超过4%的合金上形成， b） 通过重铬酸盐工艺密封， c） 进行了补充处理，例如上油、上蜡或上漆， d） 颜色深沉，而且 e） 厚度小于3μm。 如果已将镍或钴盐或有机添加剂添加到用于水热密封的槽中，则该方法不太合适。

ISO 2143 specifies a method of estimating the loss of absorptive power of anodic oxidation coatings that have undergone a sealing treatment, by dye absorption after acid pretreatment. The method is suitable for use as a production control method and can be applicable to anodic oxidation coatings which may be subjected to weathering or aggressive environments, or where resistance to staining is important. The method is not applicable to those coatings that a) are formed on alloys containing more than 2 % copper or 4 % silicon, b) are sealed by the dichromate process, c) have been given supplementary processing, e.g. oiling, waxing or lacquering, d) are coloured in deep shades, and e) are less than 3 μm thickness. The method is less appropriate where nickel or cobalt salts, or organic additives, have been added to baths used for hydrothermal sealing.