We work with barrel proofs in the case of complex printing projects, that rely on a particular tactile or refinement through metallic or other effect colours: We already carry out extensive tests on the press proofing at the start of the repro phase to optimise the interplay of all parameters in the printing process until the desired result is reached. The findings about colours, gravure parameters, separation models or substrates acquired from the test runs are then incorporated into the reproduction so that the corresponding result can ultimately be generated reliably in production printing.