How an emulsion holds together
What surrounds an oil droplet, what an emulsifier contributes, and why a smooth-looking cream tells us only part of the story.
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the surface.
The ingredients, ideas, and processes behind the everyday. A journal for curious minds, in and beyond the lab.
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Glycerin in moisturisers: hydration, concentration and feel
Glycerin’s hydration results depend on the formula and test. Look at concentration, water loss, and after-feel when comparing moisturisers.
3 min read
FDA cosmetic recall guidance: what brands should prepare for
FDA's final guidance explains when it can order a cosmetic recall and how brands can prepare their product and distribution records.
5 min read
How to compare foam and cleansing performance
Lather can be part of a good cleanser experience. Measuring it does not measure makeup removal or establish skin tolerance.
3 min read
Planning a cosmetic packaging compatibility study
A formula can look unchanged while its pump stops working properly. Plan the study around both the contents and the complete pack.
3 min read
What niacinamide studies tell formulators
The familiar 5% study, oil measurements, and barrier research answer different questions. Use those differences to plan the next formula comparison.
3 min read
Contamination risks between mixing and filling
Follow the batch through hoses, holds, pumps, and filling. Each stage can raise a different contamination question.
3 min read
Regulatory updates
All updatesUnited States
Final guidance on existing statutory authorityFDA cosmetic recall guidance: what brands should prepare for
Understand FDA's mandatory cosmetic recall process, the serious health-risk threshold, and the records and decisions that help a brand prepare.
Read briefingEuropean Union, Canada
Final regulations and implementation guidanceEU and Canada fragrance-allergen deadlines compared
Compare the EU and Canadian 2026–2028 fragrance-allergen timetables, then work through finished-product concentration, grouped names, and document changes.
Read briefingEuropean Union
Final regulationThe EU PFHxA cosmetics restriction: limits and earlier stock
Read the two PFHxA limits, assess supplier and analytical evidence, and distinguish earlier-market-placement provisions from the wider PFAS proposal.
Read briefing