The role of colored glass is to absorb the visible light of the sun, reduce the intensity of the sun, so that the sunlight becomes soft, play an anti-glare effect and improve the color of the room. It can also effectively absorb solar radiant heat, produce "cold chamber effect", and achieve the effect of heat shielding and energy saving. For example, 6mm thick transparent float glass, the total transmission heat under the sun is 84%, and the total transmission heat of colored glass under the same conditions is 60%. The color and thickness of colored glass are different, and the absorption degree of solar radiant heat is different. Colored glass still has a certain transparency, can clearly observe the outdoor scenery, bright color, durable unchanged, can increase the appearance of the building, used in the building can be strong absorption of the sun's ultraviolet rays, effectively prevent the fading and deterioration of ultraviolet rays on indoor items.Colored glass material is used in many places, the use of different colors of colored glass can make reasonable use of sunlight, adjust the indoor temperature, save the cost of air conditioning, and the appearance of the building has a good decorative effect. Generally used as doors and Windows or glass curtain walls of buildings, with the use value but also artistic value. Not only in the interior decoration, in the car glass, generally installed dark tinted glass, sunglasses are colored glass lenses. As well as a variety of decorative lampshades, in order to brilliant color, will be installed with colored glass lampshades, different color glass in various fields of science and technology has been widely used. Many examples can be given in this regard, such as photography, photometry, traffic signalling systems and the protection of vision and precision instruments from harmful light.