Sapphire glass is made by adding a certain amount of oxygen or glass salt to the original colorless glass raw material. The amount added determines the strength of the color.

Colored glass is a kind of energy-saving decorative glass that can absorb solar light and heat rays and maintain good transparency. Colored glass usually has a certain color, so it is also called colored heat-absorbing glass. Colored glass comes in blue, brown, gray, green, gold and other colors. Colored glass can effectively absorb radiant heat from the sun.