A realistic timeline for a custom lip product is 8–16 weeks: roughly 2–4 weeks for initial bench samples, 2–4 weeks for revision rounds, and 4 weeks of accelerated stability testing (40°C/75% RH minimum). Adding SPF, transfer-resistance, or clinical claims testing extends this. AJ Cosmo Labs helps you track each milestone inside the app so nothing falls through the cracks.
Read the full guide on how to find a color cosmetics chemist for lip products →