Quote:
Originally Posted by vintagetoppsguy
Based on that experience and knowledge, what chemical(s) do you think were used?
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I would think -- and this has been reinforced by people much more knowledgeable than myself -- bleach or some sort of caustic agent. I posted the contents of an email I had received early in the thread to this effect. Maybe there are newer and better methods, but I am just really skeptical that water alone could bring about that change. I mean on the SGC 50 detailed scan I posted, look at the contrast between the protected areas on the right side and the rest of the card.