How can you get white or even anything close to white to print on a dark bronze colored paper?
Typical printers will print using cyan, magenta, yellow and black inks or toners and no addition of these colored pigments on top of a dark paper will get you anything lighter than the original paper color.
On white paper, the way you get white is to not 'print' any toner/ink over that area. You cannot get whiter than the original medium unless you are doing some sort of screen printing/silk screening with a medium that resembles a paint rather than ink or toner.
(And since this isn't in a design or more professional section of the forum, I am guessing you are simply talking about a typical printer?)