#stability

Articles tagged "stability"

Oxidation of essential oils in a finished cosmetic product: the invisible enemy of a fresh scent

Oxidation of essential oils in a finished cosmetic product: the invisible enemy of a fresh scent. At the “Walker Formulation Academy” school, we are convinced that understanding chemistry is the foundation of responsible formulation, and the topic of essential oil oxidation in finished cosmetics deserves a separate and honest discussion. Most aromat

10 min2 Jun 2026

#oils and butters #stability

DIY homemade lip balm: safety, shelf life, and troubleshooting

Creating a homemade lip balm seems like a simple task: melt the wax, add oils, and pour into tubes. But this apparent simplicity hides several serious risks that are rarely mentioned in recipe articles. Oils oxidize. Essential oils, which seem harmless at

9 min26 May 2026

#safety #preservation #oils and butters

Neuropeptides in cosmetics: skin peptide reviews, mechanism of action, and formulation

Peptide cosmetics are no longer a niche topic: today, they are one of the fastest-growing segments of active ingredients. But while signal and matrikine peptides are already well-known to cream formulators, neuropeptides — and especially melanocyte-stimulating compounds — remain a gap even for ex

9 min16 May 2026

#actives #stability

Fatty acids in skin oils: how an oil's composition determines its effect in a formula

When a formulator chooses an oil for a formula, the first question is usually: "Is it light or heavy?" But behind this subjective feeling lies precise biochemistry. Fatty acids in skin oils are the molecules that determine everything: absorption rate, oxidative stability, and barrier properties.

9 min10 May 2026

#oils and butters #stability

The fridge question — why cold storage doesn't automatically make your emulsion safer

The fridge question — why cold storage doesn't automatically make your emulsion safer At the Walker Formulation Academy, we regularly encounter one of the most persistent myths in DIY skincare — the belief that a refrigerator automatically makes a product safer.<

8 min21 Apr 2026

#emulsions #rheology #oils and butters

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

Stabilizing anhydrous emulsions: advanced techniques

Analysing the stabilization mechanisms of W/O emulsions.

15 min10 Mar 2026

#stability #emulsions #lab technique

Table salt vs. magnesium sulphate: how to stabilize a water-in-oil emulsion

Table salt or magnesium sulphate for a water-in-oil emulsion? How salt stabilizes a W/O emulsion: the anchoring effect and combating Ostwald ripening. A comparative table of NaCl vs. MgSO₄.

12 min27 Feb 2026

#emulsions #stability #oils and butters