This Technical Specification specifies three methods for the adjustment of the digital content data that is input to a printing system to achieve consistency in the printed results among a number of presses printing to the same general aim conditions. These three methods are generally identified as the matching of tone value curves, the use of near-neutral scales, and the use of CMYK to CMYK multi-dimensional transforms. The procedures for establishing the aim condition for the necessary transfer curves, the procedures for determining the individual transfer curves, and a comparison of the applicability of these three methods are included. These adjustment procedures are applicable to printing systems that use CMYK colourants but are not restricted to those that use traditional ink on paper printing but can involve other marking technologies such as those used for proofing and/or digital printing.