Quote:
Originally Posted by packs
I said I would like to see other 1963 Topps cards with green boxes that are blue instead. That is not what you posted.
The Kaline card is what I'm looking for. That card is interesting because it's supposed to be green but is blue. Unlike Mantle, the Kaline has a yellow background around the inset image of him above the box. The Mantle has blue. Does that mean all cards with green bottoms are entirely blue underneath because it's part of the printing process and color has been stripped, or does the sunlight turn the green into blue?
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Yes, for nearly every card with a fairly true green it will be yellow printed along with blue. They use a few "tricks" to get effects that are needed. Like making the whole panel green so they don't have to worry about the yellow name having a green rim around it if the blue isn't opaque enough. So you get easy registration and can run lighter thinner blue.
Some cards I think may have had custom mixed colors, but I haven't studied modern ones enough. Nearly all are just cmyk overlays. Or in usual order ymck. A subtractive order has yellow being printed last, which would expose it more to fading
Im not sure it applies, but we've also just seen that yellow can be water soluble, at least on some 1972s, so that's a possibility as well now.
The process for expertizing and authenticating most things is to start assuming nothing then prove what it is. For example, I'd look for other green box 63s that had poor registration so I could see the different layers.