Glossary · Manufacturing
What Is Microbiological Testing?
Microbiological testing in cosmetics measures whether a product carries unacceptable microbial contamination and whether its preservative system controls challenge organisms. It typically combines a total viable count on the finished product with preservative efficacy testing, and it is run per batch on water-containing formulas.
Why it matters when you source
Water-based products fail on preservation, not on appearance. A factory that runs microbiology on every batch and ships the report gives you the document your safety assessor and your retailer will both ask for.
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