Cosmetic Stability Workshop
An in-depth workshop on how to run a stability test that actually predicts what happens to your product after launch.
Instant access · Watch on demand · Lifetime replay
Most Stability Failures Show Up Months After Launch.
A lotion that separates on a store shelf. A serum that turns yellow in a customer's bathroom — and ends up photographed online. By the time you find out, production costs are already paid.
This recorded workshop teaches stability testing that's relevant to the shelf, not just the lab: what testing can and can't predict, the OTC regulatory context, when to test, how to design the test, what to measure, how to make a defensible pass/fail call, and when to use an outside lab.
What Will You Learn in This Session?
What Testing Predicts
What a stability test actually reveals about your product's future — and its limits.
The Regulatory Picture
The rules that apply, especially for OTC products like sunscreens and antiperspirants.
When to Test
The situations beyond a brand-new prototype that call for a stability test.
How to Run One
Designing and executing a proper test: conditions, timepoints, and controls.
Making the Call
What to measure, when to measure it, and how to make pass/fail decisions you can defend.
DIY or a Lab
How to decide between in-house testing and sending it to an outside lab.
You'll Get These Questions Answered
- What does a stability test actually predict, and what can't it tell me?
- How long does it need to run before I can trust the result?
- What storage conditions and temperatures should I be testing at?
- Which properties should I measure, and how often?
- How do I make a pass or fail call I can defend?
- Do OTC products like sunscreens and antiperspirants need different testing?
- Should I run testing in-house or hire an outside lab?
Who Should Attend This Session?
New Formulators
Run a stability test correctly the first time, and know what to check before a formula fails after it ships.
Experienced Formulators & R&D Teams
Tighten your protocols and catch the edge cases — supplier changes, packaging interactions, freeze/thaw.
Indie Brand Owners & Founders
Understand what testing protects you against and decide whether to do it yourself or hire a lab.
QA & Regulatory Professionals
Get the OTC regulatory picture and build a pass/fail process you can defend.
About the Presenter
Perry Romanowski
Cosmetic Chemist & Founder, Chemists Corner
Perry is a cosmetic chemist and formulation instructor based in Chicago. Over more than 30 years he's formulated products at companies including Alberto Culver and founded Chemists Corner to help formulators and enthusiasts turn ideas into real products. He teaches the workshop and hosts the Q&A.
Watch Now
Recorded workshop with Perry Romanowski · includes the session recording, Q&A and a comprehensive download