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<p>[QUOTE=&quot;nesvt, post: 765823, member: 1749&quot;]cphine, no problem.&nbsp; I come here to learn and have no problem with threads changing or discussing different topics.&nbsp; It only means more discussion and learning.</p><p><br /></p><p>SilverSurfer, silver acetate?&nbsp; I think I used that in photo chem class thirty years ago; or maybe that was methyl acetate.&nbsp; Not sure what to tell you.&nbsp; Your first response mentioned that I cleaned them, that they should be downgraded, and if they weren&#039;t, you question the TPG.&nbsp; Ummm, okay. I&#039;m not a chemist, but I suggest you do a little more research.[/QUOTE]</p><p><br /></p>

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