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
Cosmetic Chemistry
Formulation, interfaces, texture, and the science of making ingredients work together.
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
What to check before using a laboratory instrument
A current service label does not answer today’s readiness question. Check the method, reference materials, readings, and response to a failure.
3 min read
How to review a cosmetic challenge-test report
A favourable conclusion is the start of the review. Check what was tested, how the method performed, and whether the formula has changed.
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
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