articles/Media/proofbeyondreasonabledoubt-page10

Proof Beyond Reasonable Doubt - proofing - part 10 of 1 2 3 4 5 6 7 8 9 10 11

by Mike McNamee Published 01/10/2008

The data above only tell part of the story. The GMG proof of the Canon advert was measured and found to have an error of just 1.6 Lab ?E. This is better than we can achieve at Professional Imagemaker as we do not have a GMG RIP; the best we do is around an average of 3.8, inside the old FOGRA standard but outside the latest one. To achieve this level of accuracy requires really stringent controls of every part of the process including temperature and humidity. The data are shown below.

Avg All 1.6
Max Value 3.3
Min Value 0.6
Primary 1.8

We are hoping to investigate some RIPs at a later date.

Papers

All the Epson papers proved to be capable, in line with Epson's claims. For a photographer wishing to create a proof for a quality magazine, the Standard Proofing Paper, or Semimatte White will cover the job very well. For lower grade paper simulation both the Publication and Commercial grades will suffice, but neither would be recommended for creating a good impression outside of a printing environment, accurate they may be, but they do lack the extra 'zing' of their companions. There has been a tendency for design houses to proof on brightened stock simply to create a more favourable impression, but this is not contract proofing!

Epson ColorBase

As part of our striving to achieve greater accuracy we employed the free utility, Epson ColorBase to linearise the test 4800 printer. This had no effect on the overall accuracy of our results although we started with a seemingly welllinearised printer. However, Colorbase would prove useful for owners of the less well specified Epson models such as the Stylus Pro 2400. These are not factory linearised and the benefits of using Colorbase are that you can pick up some high-quality profiles from the web and use them in your printing.

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