This sounds like â€˜bronzingâ€™ so called because itâ€™s usually a yellow-brown colour, rather than pink. It occurs only on gloss media and is directly related to the ink, although may vary slightly on different brands of glossy paper. A closely related problem is 'gloss differential', between printed and unprinted areas of the paper.
Avoiding certain colours will probably not make any difference as the amount of bronzing is dependent on how much ink is on the paper, not the actual colours. Also you would not be able to produce â€˜tonedâ€™ prints using greys only.
Bronzing was a much greater problem several years ago, but has been almost eliminated with current ink sets from all the major manufacturers. So far as I know the 9180 is no more prone to this problem than any other current printer.
It should be pointed out that almost any printed item (including books and magazines etc) displays some bronzing and gloss differential â€“ the only photographic reproduction not to show them is a traditional silver print.
Also bronzing and g.d. is only visible with reflected light at certain angles, when you canâ€™t see the image properly anyway. It will largely disappear under glass, if you intend to frame the prints.