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Water source/spec for facial care products
Writing to see if anyone cares to share their view on the “standard” or best practice for sourcing water used in production of facial care products. I read the February thread in which someone suspected water from the municipal line might be causing color shift. I want to know in the real-world what water most people use for production batches (e.g., deionized, distilled, demineralized). Thanks!
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