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Posted By: warshawlaw

Ask any art restorer and they will tell you the same thing: distilled water is the only stuff that doesn't deposit minerals or chemicals on paper items being soaked in it. If the dyes in the card were affected by the cleaning or if there is some kind of residue left on the card there was probably some form of chemical solvent involved. Since it removed stains but not the card colors like bleach would, I'd guess it was solvent that works on oily stains (like tobacco resins) and has additives that cause it to evaporate like dry cleaning fluid does.

All of that assumes that SGC was correct about the card and not just having a brain fart the day they looked at the card, which is why I suggested you have the card rechecked.

BOTN: get a life. Your reputation carries more weight than anything I could say.