black quartz glass is not UV through the visible and most of their absorption into infrared radiation;

Cr Ruby quartz glass tube is a new type doped silica glass, quartz glass tube and transparent compared to eamy white quartz and glass than black quartz glass with infrared thoroughly good performance, unit area can be several times a load of energy. Surface coating with quartz glass tube compared to black quartz glass tube low-cost, stable performance;

So black quartz glass tube production of infrared radiation excellent material, particularly suited for the production of high-power, small size infrared radiation from the devices.

Ruby, red ,black Quartz Tube