Types of Glass used in Pharmaceutical Industries
Type I Glass:
Highly Resistant Borosilicate.
Used for Buffered and Unbuffered aqueous solution.Type II Glas:
Highly Resistant Sodalime glass.
The buffered aqueous solution below pH 7.0Type III Glass:
Moderately Resistant Sodalime glass.
Used for dry powder and oily solution.Non-Parenteral Use
Type IV Glass:
General Purpose Sodalime glass.
Not for parenteral, tablet, liquid oral, and externals.
Engineering Properties of Glass
- Transparency
- Strength
- Workability
- Transmittance
- U value
- Recycle property
Transparency of Glass
Transparency is the main property of glass which allows the vision of the outside world through it. The transparency of glass can be from both sides or from one side only. On one side transparency, glass behaves like a mirror from the other side.
Strength of Glass
The strength of the glass depends on the modulus of the rupture value of the glass. In general, glass is a brittle material but by adding admixtures and laminates we can make it as more strong.
Workability of Glass
Glass can be molded into any shape or it can be blown during melting. So, the workability of glass is superior property of glass.
Transmittance
The visible fraction of light that passing through the glass is the property of visible transmittance.
U value of Glass
U value represents the amount of heat transferred through the glass. If a glass is said to be an insulated unit then it should have a lower value.
Recycle Property of Glass
Any glass can be 100% recyclable. It can also be used as raw material in the construction industry.