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#preservation

Articles tagged "preservation"

Formula stability: tests you should do at home

Formula stability: tests you should do at home

6 accessible stability tests for home formulators: visual assessment, Freeze-Thaw, thermal stress, pH control, centrifugation, and microbiological testing. Detailed protocols, result interpretation, and a minimum starter kit.

12 min16 Mar 2026
#stability#testing#pH
Preservation in cosmetics: why a single preservative won't save your formulation

Preservation in cosmetics: why a single preservative won't save your formulation

A detailed guide to preservation systems in cosmetics: preservative groups, pH dependence, effective combinations, challenge test, and practical recommendations from Oksana Walker.

15 min2 Mar 2026
#preservation#preservatives#microbiology