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<p>[QUOTE=&quot;desertgem, post: 519763, member: 15199&quot;]<b>End of experiment.</b></p><p><br /></p><p><b>Here are the </b>last photos of the verdigone experiment. I am going to remove all coins from solutions, rinse with water, and then allow to sit in open air for 10 days to see if there is a change in the toning. I will post photos then.</p><p><br /></p><p><b>Verdigone effects for 0hrs-8days.</b> I tried to combine so you wouldn&#039;t have to go back and forth to see. I left one out, but it isn&#039;t necessary <img src="styles/default/xenforo/clear.png" class="mceSmilieSprite mceSmilie3" alt=":(" unselectable="on" unselectable="on" /></p><p>As you know from a previous post, my microscope light bulb died in the middle , and it is one that is expensive and several weeks to deliver, and I would have to buy a minimum number so I bought a replacement at the 99 cent store.:goofer: </p><p><br /></p><p><img src="http://i455.photobucket.com/albums/qq279/desertgem/comp0-35.jpg" class="bbCodeImage wysiwygImage" alt="" unselectable="on" /></p><p><br /></p><p><img src="http://i455.photobucket.com/albums/qq279/desertgem/comp60-96.jpg" class="bbCodeImage wysiwygImage" alt="" unselectable="on" /></p><p><br /></p><p><img src="http://i455.photobucket.com/albums/qq279/desertgem/45scomp120-8day.jpg" class="bbCodeImage wysiwygImage" alt="" unselectable="on" /></p><p><br /></p><p><br /></p><p><b>Final comparison photo of the control ( left) and the verdigone treated (right) at 8days</b></p><p><b><img src="http://i455.photobucket.com/albums/qq279/desertgem/verd45s-end.jpg" class="bbCodeImage wysiwygImage" alt="" unselectable="on" /></b></p><p><b></b><b></b></p><p><b>Here is what it looked like at the beginning</b></p><p><b><img src="http://i455.photobucket.com/albums/qq279/desertgem/45s-1.jpg" class="bbCodeImage wysiwygImage" alt="" unselectable="on" /></b></p><p><b><br /></b></p><p><b><br /></b></p><p><b>UNCIRCULATED CENT COMPARISON ( using the 2 coins picked as closest in color.</b></p><p><b><br /></b></p><p><b>START:</b></p><p><b><img src="http://i455.photobucket.com/albums/qq279/desertgem/19060dss.jpg" class="bbCodeImage wysiwygImage" alt="" unselectable="on" /></b></p><p><b><br /></b></p><p><b>END of EXPERIMENT: Verdigone coin on left in both photos below</b></p><p><b><br /></b></p><p><b><img src="http://i455.photobucket.com/albums/qq279/desertgem/unc-5dayscomb.jpg" class="bbCodeImage wysiwygImage" alt="" unselectable="on" /></b></p><p><b><br /></b></p><p><b><br /></b></p><p><b>My summary view:</b></p><p><b><br /></b></p><p><b></b>1.&nbsp; &nbsp; Even though the Verdigone solution did not produce a complete result, the effect it had is very apparent. There was no way of knowing exactly what the structure of the corrosion/verdigris was at the surface. In order to stay in the premise of the experiment, no physical effort, such as with a thorn or a toothpick was not a factor. In other experiments, I found that a thin flat area of verdigris was most easily removed rather than one that was &quot;mounded&quot;. I think that this part did show that verdigris can be removed by the solution.</p><p><br /></p><p>2. It is obvious at this point that a change occurred in the patina towards a more &quot;pink/violet&quot; tint. It is hard to judge from the photos as to whether the result would be acceptable or not to the owner. I am leaving this conclusion open until the coins have sit in air for the 10 days.</p><p><br /></p><p>3. On the uncirculated coins, There was a change also in the patina. My error was to use coins that were nearly 50 years old. Uncirculated or not, they surely had some patina. After the period of time in the Verdigone, the coin was actually very similar in color to some new ones I received from the bank. As you can see from the effect the water had on the reverse of the other coin, the Verdigone seemed have a protective effect.</p><p><br /></p><p><b>My Conclusion</b> is that Verdigone does attack verdigris on copper, but it is just a conservation tool and experience and practice will determine which coins would be best served. Each coin will be different. Patina on copper is of course a combination of several copper compounds from exposure to the environment and patina color change will be determined by the time exposed to Verdigone as well as the type of patina chemical makeup, (which is not easily determined). </p><p><br /></p><p>Since my photos may be lacking, after the &quot;sitting&quot; portion is completed, I will mail the 4 experimental coins to anyone who wants to see them in hand and is willing to pay postage both ways&nbsp; and donate a couple of dollars to the forum support.</p><p><br /></p><p>Thanks for being patient.</p><p>Jim</p><p><br /></p><p>Looking forward to comments!:kewl:[/QUOTE]</p><p><br /></p>

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