Important! Grainy film from Caffenol? Don’t worry, carefully looking at the results, the difference is from using ISO 400 film rather than ISO 100 film. So, don’t worry, Caffenol can do it well.
20180326/http://www.caffenol.org/recipes/
20180326/http://www.caffenol.org/film-development-chart/
Also, note that you can reuse Caffenol for about 5 developing rolls, but make sure to use distilled water and squeeze the air out of storage bottles if you do store it.
Also, I’ve found another interesting site: Digital Truth. They’re mostly a seller rather than a community.
20180326/https://www.digitaltruth.com
Gelatin. How many ways can it be made? It is essential to film, the gelatin emulsion. How much does it affect the cost of film?
20180331/https://en.wikipedia.org/wiki/Gelatin
Suffice it to say that for photographic use, gelatin is very cheap and highly stable. Well, so point in hand. If you want good proven long-term stability of your emulsion, yes, traditional gelatin is the way to go.