Film Former
POLYBUTYLENE TEREPHTHALATE
Safety score · 0–100
Fine
Derived from EU CosIng regulatory status, PubChem hazard data and published research. How we score.
About
A synthetic plastic polymer (PBT) used as a film former in mascara and long-wear eye makeup. Inert on skin, but raises microplastic-pollution concerns in rinse-off products.
Function
Skin benefits
- Film former for long-wear mascara and eyeliner
- Inert high-molecular-weight polymer
- Improves product wear and water resistance
Known concerns
- Synthetic polymer with microplastic-shedding potential in rinse-off
- EU restricting microplastic ingredients
- Not bioavailable but environmentally persistent
References
EU CosIng database
European Commission cosmetic ingredient registry — regulatory status, restrictions, authorised functions.
Related film formers
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This profile is for educational purposes and does not constitute medical advice. Regulatory status and scientific understanding evolve — always read the physical product label and consult a healthcare professional for personal concerns.