What is the difference between plastic bottles and glass bottles for cosmetics?

Cosmetic glass bottles:
The glass bottle is a traditional packaging product, which has the characteristics of bright and transparent, good chemical stability, airtight and easy to shape, but it is heavy and fragile. 80%-90% of glass packaging containers are glass jars. Soda-lime glass bottles usually have a density of 2.5-2.6 g/cm3, which is brittle and has low thermal conductivity. Metal ion colorants can be used to make emerald green, dark green, light cyan and amber glass.

The advantages of glass packaging containers: (1) Good chemical stability, non-toxic, tasteless, hygienic and clean, and have no adverse effects on the packaging; (2) Good barrier properties, can provide good quality conditions; (3) Good transparency, clear content (4) Good rigidity, not easy to deform; (5) Good molding processability, can be processed into various shapes; (6) Good temperature resistance, high temperature sterilization, low temperature storage; (7)) Rich raw materials, recyclable Reuse, no pollution to the environment. Disadvantages of glass packaging containers; (1) Brittle and easy to break; (2) Heavy weight and high transportation cost; (3) High energy consumption during processing and serious environmental pollution; (4) Poor printing performance.

Cosmetic plastic bottles:
Plastic is a high-molecular synthetic material with many types. The advantages are: (1) Good mechanical properties, light weight, convenient storage and transportation, easy to carry and use; (2) Good barrier properties, good airtightness, and high transparency; (3) Good processing performance, which can be made into bottles of various sizes , Covers, films, bags and composite packaging materials; (4) Decorative coloring and printing performance. Drug labels, instructions, signs, and barcodes can be directly ink-jetted or printed on plastic materials without falling off; (5) Good chemical stability, low toxicity, and hygiene and safety. The lid of the medicine can be made into a safety lid or a pressure lid, and an anti-counterfeiting mark, etc. The disadvantages of plastic packaging containers are that they are easy to carry static electricity, and the surface is easily polluted. Waste materials may cause environmental pollution and the recycling process is difficult.

It can be seen from the above comparison that the two have their own advantages and disadvantages, but in general, the cosmetic glass bottle has good airtightness, stable chemical properties, and high-grade materials, which can effectively ensure that the contents do not deteriorate for a long time.
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