Why Is Pyrex Glass So Strong

Have you ever thought of how pyrex glass was made and why it is so strong? Well, when a normal glass is made and due to tempering or other processes some new characteristics appears to the glass to be normal but it is called pyrex glass. Pyrex glass is made out of borosilicate glass. It is made by heating raw material like silica sand and boric oxide to extremely high temperatures for extended periods of time. The reason why the material get melted the molecules lock together and make it harder to break at high temperatures. So Pyrex is able to expand and contract with different temperature making it less likely to break in an oven or while cooking in high or very low heat. Pyrex process of tempering is to make the glass stronger. They do this