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PETG Bottles for Cosmetics: A Blow Molding Practitioner’s Guide

Last quarter, a French skincare brand sent us samples of their serum line packaged in standard PET bottles. Within eight weeks of shelf testing, the bottles had developed visible stress crazing along the shoulder. Their formulation contained 12% alcohol and a cocktail of essential oils. The fix was straightforward: switch to PETG. PETG bottles for […]

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