Preparing future photography workshops I met some interesting articles explaining the technique to reveal, like black and white film, color film (C-41).
I found among the (few) what I liked is this: "Revelando película color con proceso para blanco y negro” by Alvaro Remesal.
These summer days, thinking about testing this experimental technique I spend a roller Fujifilm color. A Fujicolor ISO 200 and 24 exhibitions that long ago I was at home. Llegeix + about Developing color film with black and white process