#pH

Articles tagged "pH"

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

pH in cosmetics: a basic guide for formulators

Why pH is important in cosmetics: the skin's acid mantle, the working range of preservatives and actives, how to measure and safely adjust pH. Step-by-step protocol, pH table by product type.

10 min2 Mar 2026

#pH #acid mantle #pH measurement

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

Glucono-delta-lactone → Sodium gluconate: how to make a buffer for an emulsion

How to neutralize glucono-delta-lactone (GDL) to sodium gluconate: ratio of 1 g GDL = 0.225 g NaOH, step-by-step procedure, practical example for 10 g, how to incorporate the buffer into an emulsion.

8 min2 Mar 2026

#glucono-delta-lactone #sodium gluconate #buffer

Azelaic acid: calm skin without 'pilling' — a formulation guide

Complete guide to formulating with azelaic acid: mechanism of action, pH window, solubility, 5 strategies to combat pilling, ready-to-use cream formulas.

20 min25 Feb 2026

#azelaic acid #formulating #pilling