Learn how sunscreen formulas affect plastic bottles, pumps, and seals. Explore material selection, EVOH barrier tubes, PCR packaging, and compatibility testing.
Learn how to read cosmetic bottle neck finish codes such as 20/410 and 24/410, compare 400, 410, and 415 threads, and choose compatible pumps and caps.
Compare cosmetic jars and airless pump bottles for face creams and eye creams. Explore hygiene, formula protection, dispensing, product residue, and packaging costs.
Learn how foaming pumps use air, liquid, and mesh screens to create foam. Explore viscosity requirements, foam quality, clogging risks, and pump selection tips for cosmetic packaging.