They say they have 20 printers and so many different media so it takes too much time to profile every printer to every media they print on... I don´t understand that since now they´re waisting my time instead.
They just said they have 20 devices that are all over the planet with respect to consistency and behavior. Does that sound comforting? Not to me.
So if they use this Custom CMYK mode will the final result be as bad as I see it? As I said it takes away a lot of red, a lot more than other CMYK profiles.
Who knows until ink hits paper (too late to fix an expensive problem). I doubt it will work well based on what they told you above, our printers are all different. Not good.
So what should I do? Am I better off sending them a Euroscale Coated v2 CMYK? Than letting them CMYK with their weird technique?
Build your own profile for the process and bill the client. Or, send tagged RGB and tell whoever, you can't be responsible for producing color conversions to processes that are totally undefined.
I´m thinking of sending them a RGB and Euroscal Coated v2 with Epson reference prints from my 4800 and let them deal with it. They have promised me to see something before. It´s just one print of each that they´re going to make for these lightboxes on the wall.
The Epson print is useless! They can't match it. You have no way to match it to their process unless you have their profile which is the crux of this problem. Just send them tagged RGB (sRGB would be safe) and a delivery notice that you are NOT responsible for any color issues on press since someone else is doing the CMYK conversions.
Another question since I´m in Europe I should use the European CMYK profiles only? Or would the American SWOP profiles also work sometimes?
You'd think so but in this case, its just a big guessing game, one that is expensive for you should the color go poorly on press. Just don't walk into this trap. Since there's no way to define the process, stay away from this process. Or control it correctly. But a half ass approach will do you no good.