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Great Paper Chase Permajet Ultra Pearl - part 2 of 1 2 3

by Mike McNamee Published 01/02/2010

Monochrome Testing

This type of surface finish can play well with the monochrome enthusiast and for that reason we spent a little more time on this aspect than we can usually afford. We ran a full tonal analysis on the Epson Advanced Black and White (ABW) drivers.

Our deliberations suggest that a setting somewhere between Lighter and Normal allows the 50% input luminance to give 50% output luminance. The other options rather over-darkened the image and by the time we got to 'Darkest' we were a full 10% darker than the aim value. Using the ABW driver made little difference to the CII but the Dmax was raised to an impressive 2.37 - very high for a 'lustre'. Such values excite the monochrome enthusiasts; they do add depth to a print!

The base tone using ABW 'neutral' started at the base white (nominally at 2; -6) then climbed to a more neutral value as more of the truly neutral ink was set down. We made an identical print pair using 'ABW; neutral; light' and then a full-colour image using our bespoke profile. The ABW print was slightly lighter to the eye and slightly green in the mid-tones, a result confirmed by measurement. We attempted to refine the ABW shot using ABW normal (to make it darker) and settings of 10 Horizontal; 5 Vertical (to counteract the green bias). This delivered a pleasing, but very slightly warm-toned print suggesting that something like 7H; 3V would create a neutral effect. This is a personal judgement and shows off the sophistication of control available in the ABW - it allows a refined tweak of even the most brightened papers! We also noted that the prints were a rather ugly green cast under low-energy fluorescent bulbs (see the feature in this issue), this is not a comment on the paper or ink!

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1st Published 01/02/2010
last update 09/12/2022 14:57:35

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