Reversal Processing is the process required to obtain slides from a film. The basic steps are: 1) development with a strong developer (e.g. paper developer)with some silver solvent (e.g. rhodanid) 2) bleaching the developed silver with Chromium (VI) Oxide 3) clearing, removing the residues of the bleach 4) reversal exposure to a strong light source - OR - chemical reversal 5) development with a strong developer 6) fixing(posted 8375 days ago)Washing between each step, takes about 1 hour total. Kodak and tetenal (Germany) both sell chemical kits for reversal, the price per film is roughly 3 Pfunds Sterling.
Save your time and effort and use Agfa Scala and the commercial Scala process.
For more information look at the Kodak site.