2007-02-11 19:32:14 · 6 answers · asked by akki 1 in Arts & Humanities ➔ Visual Arts ➔ Photography
Only Black and white photographic paper is used within a dark room with red orange light, the photographic paper is sensitive to the blue end of the spectrum and therefore not instantly affected by red orange light. Black and White Negative Film needs to be developed in complete darkness .Colour Film negatives, Transparencies and photographic paper all have to be developed in total darkness.
2007-02-11 19:50:12 · answer #1 · answered by visyboy 3 · 1⤊ 0⤋
Light alters the film. That is how we take pictures. Expose the film to light for a split second and it would mimic the pattern of light it was exposed to. If you open up the camara and expose it to light, it alters the pattern in the film again. So you have to open the camara and develop it in the darkest condition. Unfortunately you can't see in the dark. THe next best thing to total darkness is red light. I believe the reason for that is that red light is the lowest energy light.
2007-02-11 19:43:09 · answer #2 · answered by Anonymous · 0⤊ 0⤋
Red lights are used because the red is not powerful enough to cause the negative to pick up any of the developing room, but still bright enough that you can see what you are working with.
2007-02-11 19:42:06 · answer #3 · answered by Barbara H 5 · 0⤊ 0⤋
Red light is a long wavelength that some kinds of film are not sensitive to. You can see what you're doing in the dark room that way. With other kinds of film you have to keep the place completely black.
2007-02-11 19:42:00 · answer #4 · answered by Mike D. 3 · 2⤊ 0⤋
probably has something to do with red having the longest wavelength in the visible light spectrum.
2007-02-11 19:42:55 · answer #5 · answered by anonymous 2 · 0⤊ 0⤋
This help,
http://en.wikipedia.org/wiki/Photo_developing
2007-02-11 19:45:48 · answer #6 · answered by venica 1 · 0⤊ 0⤋