The term Chrome has been used for two different things over time, one has to be careful as to which use. Originally it was short for Chromogenic, and meant B&W film where the colour response was closer to even although even today no film gives even response across all colour ranges, then the older pan films, which had poor red response Verichrome Pan is an example of this. Today it is used only in the case of colour slide films, which is a good thing. Slide films are essentially 3 layer B&W films, where the colour development comes after the reversal exposure. If you don't mind a B&W negative it can work really well, even if it is a colour slide film. Colour negative films tend to have less silver in them, so processing to a B&W negative may not work as well. Processing time, that can be tricky, longer will give more image, but increase base fog development, shorter may not give as good an image. The slower the film was originally the better, as slow films pick up less base fog then fast films over a given time period. If you have only one roll, I would say 8 minutes in D76 @ 20℃ should give an image.
Colour films if you want the colour need a special lab, as the processes have changed over the years, some like Kodachrome are now no longer possible on a commercial basis, and hand processing, while technically possible isn't logistically. I don't recall what preceded C41, not sure if anything will succeed it. B&W I think will be with us forever, although it may end up back as the domain of artisans who make their own film, paper and chemicals.
