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Paper Chase - Canvas options - part 5 of 1 2 3 4 5 6 7

by Mike McNamee Published 01/08/2004

The Blacks

The maximum depth of the black has great bearing on the way an image looks (its depth) as well as the colour error statistics. The maximum black achieved was typically around 20 to 26% brightness value with the exception of the Hahnemuhle Semi Gloss, which stood out (as it did in every measurement we made) at 16.5%.The black density of the "waterproof" materials could be improved by the application of a Giclee varnish

In general the canvas medias generate lower Dmax values, typically around 1.5, which compares to a matte silver halide paper. With coating this could be extended up towards 2.0. The variation between readings is also higher on a canvas media, up to 17 times higher in some of our data. This in fact is part of the charm of real canvas, the image changes as the light and viewing angle are changed. We partially solved the problem by taking and averaging multiple readings from the maximum black swatch in the test target.

The depth of the black has quite an influence upon the gamut volume measured from the profiles. Obviously if a longer range of deep tones is available this puts more volume into the bottom of the gamut. We confirmed this mathematically by plotting the two effects - they are indeed loosely related.

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1st Published 01/08/2004
last update 09/12/2022 14:52:14

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