A properly developed rinse-off hair mask for damaged hair typically takes 12 to 21 weeks from brief to launch-ready formula. This includes bench formulation (4–6 weeks), client revision rounds (2–4 weeks), and formal ISO 11930 preservative efficacy and stability testing (4–8 weeks). Cutting corners on stability testing is a common and costly mistake. Through AJ Cosmo Labs, you can track every milestone directly inside the iPhone app.
Read the full guide on how to find a hair mask formulator for damaged hair →