Why would a Purple car photograph Green in 1957 ???

Could be the light and pearls if any changing the appearance..My truck is purple but could not get a picture showing the true colour with 3 different cameras,the pic i put in the thread is same paint as my avatar,,finally got it right with my Canon Rebel.

 

Now this was a very intrestingread for some reason. Even tjou i know nothin about photography

 

1957 was a long time ago... A lot has changed since then. The food pyramid that was shown on cereal boxes is all different today, and so was the color wheel. In the old days the color wheel went: Yellow, Blue, orange, violet, red, indigo, green. It was changed during the Johnson administration to the red, orange, yellow, green ,blue, indigo and violet that we all know and accept today.
It really didnt seem like a big deal then, but it did create some problems with older color photos.

 

Actually the "seven colours of the rainbow" you list are a lot older than that. And there are seven of them despite there really being only six, because the theory was that it ought to line up with other stuff of which there were seven.

Indigo is really just an arbitrary spot somewhere between blue and violet. If it is a proper colour, turquoise or scarlet should be too. Logically, three primary colours (red, blue, yellow - for reflective surfaces) generate six secondary colours, or twelve tertiary colours. Now, one can take any three colours as one's base definitions, as in the CYMK system, which uses the tertiary colours cyan, magenta, and orangy-yellow for reasons of practicality in a specific industry.

The physics didn't change.

 

Old color images were developed using a chromogenic process that relied on chemical reactions to produce a set of organic dyes – red, yellow, blue – that in combination produced the color in the image. These dyes were inherently unstable and light accelerated their breakdown. Another issue was an effect causing pictures over time to turn pink or yellow. This is because in most films used since the mid 30’s, the yellow and magenta dyes were prone to increase in density over time. Kodacolor had a particular problem with prints from 1942 –1953 due to dye-forming agents called “couplers” remaining in the print after processing. And for this reason this problem is often referred to as “coupler stain”.
Gary, “Kodachrome refresh” is a term used by some studios in reference to pictures of the era that are submitted for restoration. I wish I could say there is a photoshop plug-in for it, but there’s not. At least that im aware of.
Essentially what I did to correct this pic was add some brushed layers of color to different areas with a “Multiply” blend mode over the original. Of course I had to select various areas that had been absorbed or mis-colored (chrome parts, grille, tires etc.), de-saturate them and then correct the color as best as I could. Alot more could be done to enhance the color on this but I was primarily focused on regaining the purple and giving it a vintage look.
You other guys were on the right track but since the whole pic had been effected, separate adjustments have to be made.

 

Well,.... not to throw a monkey wrench into the works,... but I just noticed something.... In the pictures of the thread I started on the Hank Negley Roadster. In some of the black & white pictures the car looks to be a dark color,... others it looks to be a light color !

I know the dark Purple was a special mix color that he spent a lot of time on,... But could there have been a translucent quality to the paint back in 1945-1947 ????

 

I only know about voices green and purple. And they were calling me last night.

 

Sometimes things that appear to be very simple sure get complicated real quick once we start really looking.

But we can all learn from others....we are never too big to know it ALL...huh.

 

So was the gr*** in the background purple too? Otherwise, why did the car fade and not the gr***?

edit: oops... gnichols and Ned Ludd already discussed this. BTW, it's ironic that Ned Ludd had a semi-technical response.

 

Not really. I just don't want certain interests to hold my technology to ransom