Types of Glass

Type I glass packaging is made from borosilicate, which has a highly resistant composition and releases the least amount of alkali. It is commonly used for pharmaceutical or fine chemical products that are sensitive to pH changes.

 

Type II glass packaging is made from commercial soda lime glass that has been de-alkalized to obtain a great improvement in chemical resistance by treating the interior surfaces at a high temperature to eat away the alkali on or near the glass surfaces. The downside of Type II glass is treating etches the surface causing a frosted appearance.

 

Type III glass bottles and containers are made of untreated commercial soda-lime glass and have average or somewhat above average chemical resistance. It is the most common type of glass and is compatible with most items such as food, beverages, common chemicals, etc.