What is Glass? Part 3 | Back Painted Glass

Types of glass and market application

The main types of glass are described below:

Commercial glass or Soda-lime (back painted glass) glass:
This is the most common commercial glass and less expensive. The composition of soda-lime glass is normally 60-75% silica, 12-18% soda, and 5-12% lime. A low percentage of other materials can be added for specific properties such as coloring.

– It has light transmission appropriate to be use in flat glass in windows;

– It has a smooth and nonporous surface that allows glass bottles and packaging glass to be easily cleaned;

– Soda-lime glass containers are virtually inert, resistant to chemical attack from aqueous solutions so they will not contaminate the contents inside or affect the taste.

Whereas pure glass SiO2 does not absorb UV light, soda-lime glass does not allow light at a wavelength of lower than 400 nm (UV light) to pass.

The disadvantages of soda-lime glass is that is not resistant to high temperatures and sudden thermal changes. For example, everybody has experienced a glass breaking down when pouring liquid at high temperature, for example to make tea.

Some of the use of soda-lime glass is primarily used for bottles, jars, everyday drinking glasses, and window glass.

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