You are going to need to print a transparency material like Pictorico or Fixxons, although I have read for silver gelatin, unlike alternative processes that I am more familiar with, a glossy RC-type generic inkjet paper works very well. Then use typical glossy settings (using PK) to print the negative of the image. Before that you will need to calibrate your process to get a correction curve that should be applied to the image ahead of inverting and flipping. It does not matter which exact media settings and icc profile is used as long as the same are used both for calibration as well as negative printing.
:Niranjan.