Any suggestions for the following. I have now done several aluminiumprints with a large printingfirm and I have a slight problem. They want the document in cmyk Fogra39. This works fine with colourprints and the colours are reasonably close to my original, no complaints. However, when I try to do a black&white image it always comes back with a green tint. Not drastic, but a photographer sees it in a split second.
I have tried to convert to their profile from a desaturated rgb file and also from a greyscale file. In both cases the converted file looks identical on my screen, no tint whatsoever.
In both cases it comes back with a slight green tint. A little frustrating.
Unfortunately service is not their strength so I don't get anybody to work with for a solution. However, I cannot ignore them because pricewise they are outstanding nobody is even close.
Should I put a little magenta in my file to compensate? Feels so wrong to do that, but don't really know what to do.