Digital BW, The Print

I am considering using the MIS VM hextone inkset in an Epson 2000 and Epson archival matte paper.

However, my first question relates to any quad or hextone ink set.

1. With a quad or hextone inkset how does one get bright whites in a print, a white brighter than the whiteness of the paper it is printed on?   All the inks are shades of black, so how can one get a white that is brighter than the paper printed on?

2. What is a good archival paper that is whiter than the Epson archival matte paper?

3. Is there any metamerism using MIS quad or hextone inks on Epson archival matter paper?   Note: Using MIS color inks, I don't see metamerism on Epson archival matte paper.  I only see the metamerism if I print on a glossy paper?