Bob,

"""Do I just reduce the max value to 85 or 90% to cure the problem?"""
I would assume that. Just adjust to "taste" and do it to both channels within this dialog. If you have a postscript driver or the like, proof both separations on your inkjet if you can.

Better still, talk to your printer/bureau, get their opinion on your concerns. If they want to charge you for a quick assesment or advice, go elsewhere and feel free to do so.

Wayne