a dye mixture depending upon the color desired thus the term dye as used herein includes dye mixture the dye class known as u201c solvent dyes u201d is useful in the practice of the present invention this dye class includes the preferred dyes solvent blue 35 solvent green 3 and acridine orange base however solvent dyes in general do not color as intensely as do disperse dyes among the suitable dyes special mention is made of water insoluble azo diphenylamine and anthraquinone compounds especially suitable are acetate dyes dispersed acetate dyes dispersion dyes and dispersol dyes such as are disclosed in colour index 3 rd edition vol 2 the society of dyers and colourists 1971 pp 2479 and pp 2187 2743 respectively all incorporated herein by reference the preferred dispersed dyes include dystar 39 s palanil blue e r150 anthraquinone disperse blue and dianix orange e 3rn azo dye cl disperse orange 25 note that phenol red and 4 phenylazophenol do not dye polycarbonate in accordance with the inventive process the dyes known as u201c direct dyes u201d and the ones termed u201c acid dyes u201d are not suitable in the practice of the invention for polycarbonate however acid dyes are effective with nylon the amount of dye used in the mixture can vary however only small amounts are typically needed to sufficiently tint.