You can purchase toner from your authorized Toshiba dealer. If you take two pieces of paper from two different sources and put them next to each other, they will usually be a different shade of white. The whiter the paper is, the better the contrast between the black toner and the paper and the better your copies will look. The smoother the paper, the better the toner transfers to it.
Smoother paper gives sharper copies and better fills.
Smoother paper is also more difficult to feed. The paper needs some coating of clay or dust to help the paper separate and feed. In moderate and high volume machines, this dust builds up inside the copier and it is cleaned out as part of the PM cycle. If the paper is excessively dusty, then the copier may require additional cleaning in between the normal maintenance cycles. Paper has a natural curl to it.