How much silver is needed to result in argyria remains unknown, as does the exposure length. Scientific studies report various lengths of publicity from 8 months to five years. After argyria occurs, the colour change to the pores and skin is irreversible. Catalytic Oxidation: Silver naturally retains onto oxygen molecules, https://bookmarkingbay.com/story14749411/considerations-to-know-about-pure-colloidal-silver