Fluorescence and kubelka‐munk theory

Abstract

Abstract An expression is derived for the spectral radiance factor of a thick sample of material which scatters and absorbs light, and to which has been added a fluorescent dye. It is also shown how to work backwards, calculating absorption and emission spectra of the dye from measurements on dyed and undyed samples. This theory has practical application in colorant formulation, and examples using up to three dyes to colour paper are discussed.