Brian, I have heard of this before, but is it truly confirmed? The amount of labor involved seems hardly justified, especially when documenting a one-off locomotive order.Brian Norden wrote:In the 20th Century the firms were known to apply a gray wash or even a special paint color to obtain contrast between components and make some better stand out. Then the wash was removed or the locomotive repainted; the wash or paint may have only been applied to one side of the locomotive.
It would not surprise me if this occurred during the 19th Century.
The apparent "grey" color of many 20thC engines could just as easily have occurred if the locomotive had a planished iron jacket or was actually painted green, which many of them were, despite the common assumption that almost all locomotives in the 20thC were black.
There are other possible causes of the "grey" appearance or inaccurate color value translations:
- Exposure and Contrast could be adjusted to create a more uniform and detailed image
Early film emulsion's over sensitivity to Blue and Violet light - This would have caused parts of the locomotive reflecting the sky to appear much lighter than it would be seen by our eyes
Color filters have long been used in B&W photography to alter how a scene will appear when translated into the greyscale of B&W