In reply to ralphio:
Which printer do you have? Is it a photo quality printer? Much depends on what options your printer gives and has defaulted to or sets automatically determined on source requested.
Generally you will need to access the printer properties options and then look for example quality type speed and quality settings which may say things like normal, fast, best, photo, etc. May also have more obscure options defaulted with things like everyday printing, internet printing or draft printing. Just a guess without knowing your printer.
BTW, I have only ever used 80 or 90 gsm paper for printing maps for day to day use, and using a printer with 6 separate colour ink tanks have had no problem for years. An older printer that used composite 3 colour tanks was a bit more problematic and the contours were a bit on the faint side.