Re: epson 1400 setting RGB or CMYK? RGB colour gamuts are usually larger than CMYK and it makes sense to keep the gamut as large as possible until the last minute, but as long as you working CMYK profile is as big or greater than your output profile it shouldn't clip any colours.
These things are maps and points (colours) are converted between them, it is only when colours are off the map that compromises are made. |