I find a roll of Fortechrom slide among my old stuff. It is 20+ years old. I would like to use it and develop it by myself. I would appreciate any advice about exposure. Thanks
In case you are determined to develop that film and are ready to home brew: It supposedly requires the ORWO 9165 process, for which you can find a recipe (in German language) here. The color developer used in this process is listed as T-22 which may be better known as CD-1 or N,N-Diethyl-p-Phenylenediamine Sulfate.
Unless you're really into experimentation, it's probably not usable by now. But don't bin it, it's quite a nice collectable for those strange people, such as me, who like the design of old film cartons.