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Message:: [QUOTE="mlov43, post: 1819700, member: 16729"]I need to fill a few holes in my contemporary Japanese coin collection (1948 to 1980-dated coins).   Not being able to find the years I'm looking for, I thought of breaking the coins out of some common mint sets.   I did find someone selling mint sets for four of these years: 1976, 1977, 1978, 1979. The Japan Mint, for whatever reason, decided to encase its yearly mint sets they made in the 1970s and early 1980s in lovely, supple, old-school shower-curtain material.  So, the problem was, the mint sets that I had found online had PVC damage in the form of brilliant green verdigris (if that's what it's called?) on the coins inside.  The online store clearly showed the level of damage that they had, and clearly noted "PVC Damage" in the item description. I remember reading about Verdi-Care here at CT.  Combined, the four mint sets cost 12 bucks.  If I ruined the coins trying to "conserve" (or is it "restore...?") them with this treatment, or if I read the directions wrong and messed it up, I figured it wouldn't be much of a loss.   I'd also gain some knowledge just by trying it out. Here's what they looked like:[ATTACH=full]298585[/ATTACH][/QUOTE]