The coloration of the glass is caused by the difference in the degree of transmission of different wavelengths when visible light is transmitted through the glass. The reason is that the light caused by the transition of the transition metal ion or the rare earth metal ion dissolved in the glass absorbs or disperses in the glass, and the dispersion of the colloid-like element or compound fine particles and the absorption center or the radiation center. Light absorption caused by etc. Metal Forming Rollers,Metal Roller Wheel,Stainless Steel Rollers With Bearings,Metal Roller Track HANGZHOU KUNTAI HARDWARE CO., LTD. , https://www.hzktwj.com