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
Formulation
pH and buffer capacity: why the same reading can behave differently
Two formulas can share pH 5.2 and respond differently to an addition. Understand buffer capacity, measurement conditions, and the limits of a pH result.
3 min read
Which formula did we make? Keeping versions identifiable
A pilot ticket says version 3, but its quantities match version 4. Here is how clear formula history helps resolve that mismatch.
3 min read
How to plan and record a cosmetic stability study
Plan the samples and measurements before storage begins, then follow changes in the formula and its packaging through to the report.
3 min read
Choosing a PDRN ingredient for skincare
Two PDRN ingredients added at the same rate may deliver very different amounts. Start with composition, then examine the studies and proposed claim.
3 min read
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.
2 min read
How to write a texture note someone else can use
Replace “luxurious” with a description of what happened in the jar, during spreading, and after application.
2 min read
Triphenyl phosphate in EU cosmetics: the 2027 and 2028 deadlines
The EU is prohibiting triphenyl phosphate in cosmetics. Distinguish the 2027 placement deadline from the 2028 deadline for later supply.
6 min read