posted on May, 13 2011 @ 04:32 PM
reply to post by SaberTruth
Because they don't. I'm not making up a fact about photography for the sake of saving you the time it takes to scan, the truth is that it isn't
viable evidence if your argument is "the colors in this photo look different than the colors outside today." If you do a two second search on the
internet, you will find many reasons for the deterioration of photographs, here is a chunk from wikipedia that lists some:
Numerous factors can deteriorate and even destroy photographs. Some examples include:
High temperature and high relative humidity (RH)
Air pollution and dirt
Biological threats such as fungi and insects
Residual processing chemicals
Base and emulsion deterioration
Handling and usage
Improper storage and enclosures
Three signs of age that affect color photography are:
Dark fading occurs regardless of the procedures taken to preserve a photograph and is unavoidable. It is instigated by temperature and RH. Cyan dyes
will typically fade more quickly, which will make the image appear too red in color.
Light fading occurs when materials are exposed to light, e.g. while on display. The intensity of the light source and ultraviolet (UV) rays will
affect the rate of change and fade. Magenta dyes will typically fade the quickest.
Highlight staining occurs with older color photographic papers, and is a yellowing of the border and highlight areas of a photograph."