This is a classification of glass for containers, which has been adopted by different pharmacopeia in order to determine the more appropriate use of glass based on the contents of the containers. There are glass types I, II, and III.
Type I - Borosilicate Glass
Type I borosilicate glass has the best thermal shock resistance and excellent chemical resistance. This type of glass is the least reactive glass container available. This type of glass offers superior durability, and chemical and heat resistance. It is commonly used in chemical laboratory equipment.
Borosilicate glass contains large amounts of boron oxide, alumina, alkali, and/or alkaline earth oxides. Borosilicate glass container is highly resistant to hydrolysis due to its chemical composition.
Type I glass can be used to package acidic, neutral, and alkaline products. Water for injection, unbuffered products, chemicals, sensitive products, and products requiring disinfection are usually packed in type I borosilicate glass. Type I glass may be chemically eroded under certain conditions; therefore, containers must be chosen carefully for both very low and very high pH applications.
Type III - Soda-Lime Glass
Type III glass is a silicon glass containing alkali metal oxides. Soda-lime glass exhibits moderate chemical resistance and moderate resistance to hydrolysis (water). This glass is inexpensive and chemically stable, making it ideal for recycling because the glass can be remelted and remolded several times.
This type of glass is known for its low price, chemical stability, good electrical insulation, and easy processing. In contrast to other types of glass, soda lime glass can be re-softened as many times as necessary. As such, it is widely used in many commercial glass products such as light bulbs, window panes, bottles, and works of art. Note, however, that sodium-calcium glass is susceptible to sudden changes in temperature and may break.
Type III glass packaging is commonly used in beverages and food.
Type III glass is not suitable for autoclaving products because the autoclaving process can accelerate the corrosion reaction of the glass. The dry heat sterilization process is usually not a problem for type III containers.
Type II - Treated Soda-Lime Glass
Type II glass is type III glass that has been surface treated to increase its hydrolytic stability from moderate to a high level. The type of container is suitable for acid and neutral preparations.
The difference between type II and type I glass containers is that type II glass has a lower melting point. They do a good job of protecting the contents from weathering. Type II glass, however, is easier to form but less able to withstand high temperatures.
The difference between type II and type III glass containers is that the inside of Type II containers is treated with sulfur.
XuzhouAnt Glass Products Co.,Ltd is a professional supplier in China’s glassware industry, we are mainly working on various kinds of glass bottles and glass jars . We are also able to offer decorating, screen printing ,spray painting and other deep-processing to fulfill “one-stop shop” services. Xuzhou Ant glass is a professional team which has the ability to customize glass packaging in accordance with customers’ requirements, and offer professional solutions for customers to raise their products value. Customer satisfaction, high quality products and convenient service are our company’s missions. We believe we are capable of assisting your business to grow up continuously together with us.
Follow Us for More Information
If you are interested in our products, please feel free to contact us:
Email: rachel@antpackaging.com/ claus@antpackaging.com
Tel: 86-15190696079
Post time: Oct-28-2022