Alien Skin: Film Grain Effects for Digital Enthusiasts

https://www.alienskin.com/blog/2017/film-grain-effects-for-digital-enthusiasts/

“… When I add grain, it is solely through Exposure. One of the main reasons I add grain is because I want the image when viewed onscreen to have that touchable, tactile, textured quality. I think about it like it’s a sheet of fine-grit sandpaper. I want the completed work to evoke the idea of a printed picture when you view it. So I usually make the grain small, add it most in the shadows and least in the highlights but still across the whole image….”

Link: