A supplier changed an ingredient specification. What happens next?
A revised limit, test method, and material composition are different changes. Establish which occurred before accepting the next delivery.
3 min read
The journals
Three perspectives on the science and craft of cosmetics.
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
Taking a formula from the lab to production
A formula and a sample jar leave important gaps. Follow the information needed to take a laboratory lotion into a pilot batch.
2 min read
What you can learn from an ingredient list
Ingredient names and their order tell you something about a cosmetic. They do not reveal exact percentages or prove its performance.
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
How to make a batch record easier to follow
A worked example shows why “added more water, checked again, OK” is not enough for the next person reviewing a batch.
2 min read
How to turn an ingredient pitch into a trial
Start with a problem in the product, identify the commercial material, and design a comparison that can answer the question.
2 min read