At 8:31 AM -0700 8/6/05, nivant wrote:
What would you recommend in the following case:
We have previously printed to a DesignJet 1055 without any ICC workflow. Now, we’ve got a new DesignJet 5500 and want to move to an ICC workflow BUT want to preserve the colors as closely as possible as they printed from DJ 1055.
a variation on an old classic…
Of course, since there was no ICC workflow in place, just calibrating the monitor and profiling the printer won’t give us the “old colors” because the “old colors” where probably “wrong”. The purpose is map printing so the number of distinct colors is fairly small. Can we do something like measuring colors from old prints and input them as sRGB values to our application, giving us the old colors with their real sRGB values?
Here’s the situation.
- First, I hope you still have the old printer.
- If no color management occurred when printing to the 1055 then the files could be considered to be “in” “1055 CMYK”.
- What are trying to do is print to “5500 CMYK”
- In order to do this you need a profile for the 1055 and one for the 5500. Then you simply convert the files (In Photoshop or in-RIP or whatever) from 1055 to 5500 CMYK.
A curve ball would be if the files are in RGB. This is still possible though. What you do is print an RGB profiling target to the 1055 and build a profile of the “RGB print path” to the 1055. Then, as above, you would convert from the new RGB profile to the 5500 profile and you’re set.
Both of these conversions would involve first Assigning the profile in Photoshop and then Converting to the destination.
In other words, is there a cheap device that can measure colors from paper and give us sRGB values or some other values that can easily be converted into sRGB? Or is there some other way we should go?
not a cheap device but a fairly cheap service (our ColorValet service)
We do not need “high-quality color matching”, just a reasonable match to old colors.
yup, that should do it.
A variation on your story is one where a printer brought us a color copier print that their customer loved but they could not reproduce on press no matter how hard they tried. The customer liked the copier print so, effectively, their file was in “copier CMYK”. We built a profile for the customer’s copier and then converted the file from copierCMYK to SWOP-CMYK and they were set.
I remember them saying they could have never done it with curves and that’s the truth. Color Management is WAY MORE than curve correction. It’s all about appearance matching. If you can capture something about the source appearance then you can usually convert to your destination and save hours of work.
Hope this helps…
o Steve Upton CHROMiX www.chromix.com
o (hueman) 866.CHROMiX
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