I've never processed color film but I've had years of processing Black and White film and prints. My father and I built a darkroom in the basement of our house.

Dad was a historian and published 5 books with photographs copied from old postcards he collected.

He would go back to the same spot where a postcard was photographed to make a Then & Now tour.

Needless to say I've spent much of my life in the darkroom. B/W photography isn't sensitive to red light so it's not completely dark as it is with color film.

Also spent many years doing offset printing from small presses to large newspaper presses. The process is much the same.