I think by nature of pigment inks which sit on top of RC coated paper, there is simply no way around this. About the only thing I've read, but not tested, is to change any areas that have no ink laid down since they are 255,255,255, in terms of RGB values, and perhaps make it just a tad darker, to about 252,252,252. Fairly easy to do in photoshop, but of course requires work for each image.