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Cosmetic Materials Guide

Comparing PETG, PP, heavy glass, aluminum, and PCR resins for formula compatibility, clarity, and sustainability.

Cosmetic Packaging Resins and Glass Substrates — Material samples comparing PETG transparency, heavy glass, and PCR resin content.

Material choice directly dictates container transparency, drop impact resistance, decoration options, chemical compatibility, and environmental sustainability claims.

Resin & Substrate Comparison

PP (Polypropylene) — Highly chemically resistant, translucent/opaque, budget-friendly, widely recyclable (SPI Resin Code 5)
PET & PETG — Exceptional crystal transparency, high impact strength, ideal for serums, cleansers, and toners
Heavy Glass — Total chemical inertness, high-end weight and tactile prestige, infinite recyclability
Aluminum — 100% light barrier protection, sleek metallic modern look, lightweight shipping
PCR (Post-Consumer Recycled) — Available in PP and PET blends to meet brand sustainability commitments

Chemical Compatibility & Testing

Essential oils, high-alcohol formulations, and acidic active ingredients can cause stress-cracking or leaching in non-compatible polymers.

Always conduct formula compatibility and stress-crack testing with your chemist prior to bulk resin approval.

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