Is the income of a Muslim who works in a film developing shop, receiving films from customers and placing them in the developing machine, permissible or impermissible?

It is permissible to develop photographic films that people need for a necessity, a general need, or a public interest. It is also permissible to adopt this as a profession and a source of livelihood, because what is permitted out of necessity can be dealt with. As for pictures that are not necessitated by a necessity and do not serve an interest, the preponderant opinion is that they are forbidden, and it is forbidden to develop their films.