I am using Profilemaker 5 to make ICC profiles for RA4 papers printed on a Lightjet printer. The most saturated yellows available with the RA4 process are quite reddish compared to process yellow or the yellows of inkjet printers (and the Yellow primary of RGB working colour spaces such as Adobe RGB 1998).
When an RGB image (in Adobe RGB 1998) with very saturated yellows is printed (around 250 to 255R, 250-255G, 0-20B) the saturated yellows need to be mapped back into the printer’s available gamut. Unfortunately the result is a dull greenish yellow that is much less saturated than the most saturated yellow available in the RA4 process.
In essence the problem is that the Yellow primary of the RA4 paper has a different hue (more reddish) than the Yellow primary of the image (in Adobe RGB 1998).
Has anyone experienced this problem and are there any known solutions. I have tried editing the profiles to shift the saturated yellows towards the paper’s gamut but it tends to lead to banding.
Here is a screen grab from Colorthink that illustrates the problem.