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<p>[QUOTE=&quot;Paul M., post: 2182518, member: 73165&quot;]In place of sulfuric acid, you can use citric acid as well.&nbsp; This works better because the acid isn&#039;t as strong and doesn&#039;t attack the silver as readily.&nbsp; This formula has been used <a href="https://books.google.com/books?id=b6kaAQAAMAAJ&amp;pg=PA192&amp;lpg=PA192&amp;dq=citric+acid+thiourea+silver&amp;source=bl&amp;ots=0-qOUZgtrg&amp;sig=nyQNS8Aj55kfCizxeFfnB1-bqis&amp;hl=en&amp;sa=X&amp;ei=wtqMVcCmCcPLogT34r7oAg&amp;ved=0CDcQ6AEwBA#v=onepage&amp;q=citric%20acid%20thiourea%20silver&amp;f=false" target="_blank" class="externalLink ProxyLink" data-proxy-href="https://books.google.com/books?id=b6kaAQAAMAAJ&amp;pg=PA192&amp;lpg=PA192&amp;dq=citric+acid+thiourea+silver&amp;source=bl&amp;ots=0-qOUZgtrg&amp;sig=nyQNS8Aj55kfCizxeFfnB1-bqis&amp;hl=en&amp;sa=X&amp;ei=wtqMVcCmCcPLogT34r7oAg&amp;ved=0CDcQ6AEwBA#v=onepage&amp;q=citric%20acid%20thiourea%20silver&amp;f=false" rel="nofollow">to remove fogging from photographic negatives</a>.</p><p><br /></p><p>If you go with eZest, I&#039;d recommend heavily diluting it.&nbsp; It&#039;s easier to control the dip that way.&nbsp; Undiluted, you can easily overdip in a matter of a couple seconds.[/QUOTE]</p><p><br /></p>

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