1 be a family of similitudes on R 1 satisfying the strong separation condition and ν the self-similar measure associated with {f i } N 1 and a probability vector (t 1 , . . . , t N ). Let μ be the attracting measure of a condensation system associated with ν, {f i } N 1 and a probability vector (p 0 , p 1 , . . . , p N ). We establish a relationship between the quantization dimension of μ and its mass distribution on cylinder sets.