Re: Why are pure colors so desaturated when applying printer profiles?
Re: Why are pure colors so desaturated when applying printer profiles?
- Subject: Re: Why are pure colors so desaturated when applying printer profiles?
- From: email@hidden
- Date: Fri, 11 May 2001 10:47:18 EDT
In a message dated 5/11/01 9:53:30 AM, email@hidden writes:
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In printing to our Fuji Pictro 4000, we're getting very good results on
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the scans
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and IT8 part of the test target through the profile, both in converting
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to profile
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in Photoshop and in letting Iqueue apply the profile - BUT - the RGB patches
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desaturate dramatically when the profile is applied (R=253,83,58
G=102,254,90
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B=52,87,238). On test prints that use the profile, the RGB patches print
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on our
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Fuji as pukey orange, mashed peas green and a violet. the rest of the
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print looks
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great. When we send the test target still in AdobeRGB to the printer,
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we get a
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slightly cool version, but with much more saturated RGB patches.
The issue here is one of vector colors, the raster colors in your images are
not effected; its only the high saturation "recipe" colors. I would not
assume that your Fuji was capable of printing the full gamut of AdobeRGB, or
even close to it! So the issue here is how the recipe colors 0,255,0 etc map
to the gamut of the Fuji. They appear to be mapping in with nearly full
values for the dominant color, but disturbingly high percentages of the other
colors as well. This is a function of the mapping method and rendering
intent; my profiles for RGB photo printers generally have secondary color
values in the teens, or at most the 30s, not over a hundred as yours show.
C. David Tobie
Design Cooperative
email@hidden