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GMG claims excellent colour results

One of the tasks was to visually match the proof to a reference print, although not all participants understood this correctly. While GMG and one other manufacturer did visual matching, the remaining participants matched the proof colorimetrically, exclusively in relation to reference values. The GMG proof and the proof produced by the other manufacturer were put on display for the visitors to the Print Media Production Forum as examples of outstanding visual matching.

GMG came out on top, along with two other manufacturers, in the colorimetric assessment of various media wedges according to the “QProof(2.0)” evaluation method of Wuppertal University, 100% target achievement being attained for all three media wedges. GMG has a slight lead when new assessment methods are applied, e.g. the score method (weighted rating for Minimum (multiplier 1), Maximum (1), Mean (4) and Standard deviation (3)).

A further test referred to the long-term stability of the proofs. To this end, two proofs were initially produced on the remote proofing system and compared to each other. Four weeks later, a further two proofs were output, again being compared to each other, and also to the previously produced proofs. Here, too, GMG passed the test without any criticism.

While the media wedge was used exclusively for proof-to-print assessment at all events of this kind in recent years, the situation was different at this year’s Print Media Production Forum.

This time, proof-to-proof assessments were shown, as long advocated by GMG for controlling the quality of proofs. Unfortunately, DeltaE assessment relative to the print was dispensed with completely, although the particular task in hand would have been a good example for demonstrating the inadequacy of DeltaE assessment in relation to the various wedges.

“We are delighted that our solution once more did so exceedingly well in the colorimetric and visual assessment of remote proofs,” says Robert Weihing, Managing Director of GMG GmbH & Co. KG. “It was yet again obvious that small DeltaE values do not necessarily mean a good visual match. The decisive factor is what the proofing software can get out of the printer’s given color space. GMG has clear advantages in this respect. We make optimum use of the printer’s color space, meaning that we arrive at the best results.”