Wavelength range of a light source. Wideband light appears white, narrowband light coloured.

is a borosilicate glass produced by a floating process. Besides good thermal characteristics, specified in the standard ISO 3585 “Borosilicate glass 3.3” which is also met by the laboratory glasses Duran and Pyrex, Borofloat shows excellent optical properties (homogeneity and transmission) as well as very good fire-polished surfaces.

In addition to silicon dioxide, it also contains a considerable quantity of boron trioxide. The glass properties are positively influenced by adding B2O3.