EddieB, on 28 Mar 2014 - 18:52, said: ... it is well-known that fluorescent lighting can cause greenish casts on colour film - so any photos taken in the shed under such condition may appear greenish.
Hi EddieB,
You raise a good point about the environmental effects on photography. My other passion is aviation and I know from forums on that subject, the passionate debate raised about the colour of paint or hue thereof, evidenced by some wartime colour photo.
There (as in the locos above), you are up against many contributing factors: how faithful was the film used, in rendering the true paint colour anyway? Was the film originally developed correctly (and any prints for that matter)? How have the film (or prints) degraded in the intervening years? Under what environmental lighting conditions were the photos taken (including natural light or flash)?
On the latter point, a classic example is a wartime photo of a Bristol Beaufighter, flying above the Mediteranean - much conjecture about the shade of blue used on the underside of the aircraft, but pointless to debate this in a way, because any photo taken in that environment, will have a blue cast due to the sky above and sea below.
So unless someone at the time, stood next to the object with a Munsell or BSI Chart in hand for comparison, photographs are, by definition, always going to be second best as evidence.
Steve N