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<p>[QUOTE=&quot;JohnnyC, post: 8268816, member: 101968&quot;]Sodium thiosulfate (&quot;hypo&quot;, the photographer&#039;s &quot;fixer&quot;) dissolves horn silver (silver chloride); mild acids dissolve silver oxide.</p><p>Neither will damage good quality silver if used in moderation, but acids may leach copper from the surface of poorer quality silver leading to surface silver enrichment.</p><p><br /></p><p>Ross G.[/QUOTE]</p><p><br /></p>

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