Glossary · Manufacturing
What Is Purified Water?
Purified water is water treated — usually by reverse osmosis, deionisation or distillation — to remove ions, organic matter and microorganisms so it can act as a cosmetic ingredient without introducing contamination or interfering with the formula. It is typically the largest single ingredient by percentage in a water-based product.
Why it matters when you source
Water is the ingredient a formula can least afford to get wrong, because its quality affects preservation, pH and stability at once. Ask how the factory produces and monitors its process water, and how often the treatment system is sanitised.
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