The production of high barrier films with eleven instead of nine layers? On the one hand an investment in complex modern equipment and on the other an increase in flexibility. Nevertheless the question is: Is it worthwhile? The answer is a very definite yes! In less than a year the investment in an 11 layer blown film line instead of a 9-layer line can be amortised by fully exploiting the diverse opportunities offered by the gained flexibility, the possible savings in raw material and the augmented production capacity.