Glass is formed by melting silicon dioxide and other chemical substances together (the main production materials are: soda ash, limestone, quartz). A silicate non-metallic material that forms a continuous network structure during melting, gradually increasing viscosity during cooling and hardening, resulting in its crystallization. The chemical composition of ordinary glass is Na2SiO3, CaSiO3, SiO2 or Na2O · CaO · 6SiO2, etc. The main component is silicate double salt, which is an amorphous solid with an irregular structure.

Glass bottles do not have a specific material classification, but are often classified based on their purpose,

Advantages of Cosmetic Packaging Glass Bottles

1. The glass material is lead-free and harmless, with good barrier performance, which can effectively prevent various gases from oxidizing and eroding the objects inside the bottle, and also effectively prevent the volatile components of the inner material from volatilizing.

2. Glass bottles are safe and hygienic, non-toxic and harmless, with good corrosion and acid resistance. They can be recycled and reused multiple times, which is beneficial for environmental protection and has a special packaging advantage for the cosmetics industry.

Classification and matching of cosmetic glass bottles

1. Cream bottle series: wide mouth glass bottle body+double layer plastic outer cover (usually with a capacity of 10g-50g).
2. Essence serum bottle series: narrow mouth glass bottle body+plastic pump head or anodized pump head (generally 20 to 100ml)
3. Toner bottle series: Narrow mouth glass bottle body+plastic inner stopper+outer cover (40-120ml, some with pump head)
4. Essential oil bottle series: Narrow mouth glass bottle body+inner plug+large head cap or rubber head+dropper+electrochemical aluminum cap. Essential oil bottles are usually used in a brown or colored or colored matte, which can avoid light and provide better protection for the essential oil material.

Attention: Glass bottles with a capacity greater than 200ml are rarely used in cosmetics. The main reason is that the capacity is too large, coupled with the weight of the glass bottle, the overall weight is too large, which can be relatively clumsy for women to use, making it feel like stir frying vegetables and pouring soy sauce.