polaroid – Instax Film Developing Red

I have finished the instant pinhole camera that I mentioned in a previous question. To open the package of Instax Film, I used a black piece, blocked all the edges around the door and opening it with the help of some red lights.

When I use a rolling pin to develop the film, everything is red. I have read many articles saying that red LEDs are good for use as a flash of light.

Were these messages wrong or is it a different problem?