I’m not really much of a shopper but after this morning’s round of golf, my father in law and I went to American Science and Surplus. It’s a fun store literally full of science stuff and other junk. Take a look at these old shampoos. You can tell they must be old because much of the product has evaporated out of the container. The chemist probably didn’t count on needing a 5+ year stability testing.
Perry has been formulating cosmetic products and inventing solutions to solve consumer problems since the early 1990’s. Additionally, he has written and edited numerous articles and books, taught continuing education classes for industry scientists, and developed successful websites. His latest book is Beginning Cosmetic Chemistry 3rd Edition published by Allured.