articles/Paper/fourbaryt-page6
by Mike McNamee Published 01/06/2010
Using the Canson profile
Mainly because it is the first time we have tested the Canson Photographique we also looked at the audit data when using the profile downloadable from their website. This was a nicely made profile with good shadow detail and highlight retention. It did suffer though for lack of saturation across the gamut which depressed the average error across the Macbeth Chart. It also created a lighter print (4% was measured - some may prefer this rendering of the target), and this seemed to reduce the small amount of gloss differential present in the bespoke profile print. The gamut volume for the Canson profile was lower (849,125 playing off 888,872 Lab units). The overall error was about 50% higher but still good (ie better than average).
Monochrome from All-colour inks
All four samples retained highlight detail to 250 RGB points, slightly lower than the 252 points we normally achieve. All samples retained shadow detail down to between 15 and 20 RGB points - better than many and probably a result of the coating's ability to hold high Dmax. The greyscale ramps were smooth from shadow to highlight. The Colour Inconstancy Indices were moderately good (see table) but not the lowest we have recorded. There was no visually detectable metamerism and one of the features of the monochromes was the purity of the neutral greys. These greys were clustered around the base tone of the papers, ie slightly warm for Platinum Warm Tone, cool for Platinum Gloss and neutral for the other two.
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