The third cause of impurities is also the result of the manufacture process but is caused by external factors, on the contrary to the previous point. The whole manufacturing process, from production, to storage and migration from packaging, is vulnerable to contamination. Contamination could for example come from disinfectants, such as Chloramine-T, that are used on the production site and carried over to the products.
But contamination could also come from pesticides that are used on crops that later become cosmetic ingredients. One example is hydrogenated cottonseed oil, a substance known to contain both pesticides and metals from manufacture. While some metals, such as iron, serve various functions in our bodies, contamination from metals like lead and arsenic only have negative effects.
The last group of contaminators that Curious Chloride scans are metals found in cosmetic colorants. Color cosmetics such as eye shadows, eyeliners, lipsticks and blushes, sometimes intentionally contain small amounts of metals like chromium and aluminium. But some color additives are unfortunately also unintentionally polluted by dangerous heavy metals such as lead, arsenic, and mercury.