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<p>[QUOTE=&quot;techbiker, post: 9559056, member: 60629&quot;]Verybrad, I&#039;ve had good luck &quot;dry cleaning&quot; watercolors with eraser crumbs. Often, dry cleaning improves contrast and diminishes the appearance of foxing. I&#039;ve never had proper equipment to wash paper artifacts, however I&#039;ve performed some research. You might be surprised by the results of a good dry clean and potentially a mild alkaline wash or two. <a href="https://www.conservation-wiki.com/wiki/BPG_Washing#Alkaline_Solutions" target="_blank" class="externalLink ProxyLink" data-proxy-href="https://www.conservation-wiki.com/wiki/BPG_Washing#Alkaline_Solutions" rel="nofollow">BPG Washing - MediaWiki (conservation-wiki.com)</a></p><p><br /></p><p>Once surface deposits are removed, there are a variety of washing techniques conservators perform (blotting all the way to steaming, floating, and full submersions). Apparently, foxing is associated with acidity. I&#039;ve heard that raising (and potentially buffering) the pH of the paper may significantly reduce foxing. At the very least, washing should increase contrast by removing embedded grime.</p><p><br /></p><p>Personally, I would never risk bleaching paper art of any value. I would attempt an alkaline wash with a $50 etching though. Note I&#039;m not an expert![/QUOTE]</p><p><br /></p>

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