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Treasure Hunting
Cleaning Your Finds
Cleaning cupronickel coins 1930's French Francs
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<blockquote data-quote="Greenhornet_au" data-source="post: 311482" data-attributes="member: 8767"><p>When I did the CAB I used CA in the rotary tumbler, maybe I will just use a bit of detergent and water to allow them to clean with just the stainless pins,</p><p>will try one coin first.</p><p>I will try one in a vibratory tumbler also with a bit of Nufinish polish in the corn cob media.</p><p></p><p>ONLY because they have LOW value</p><p></p><p>I think electrolysis would be damaging unless I pulled Nickle over onto them.</p><p>Maybe some other light chemicals for the crud that doesnt attack copper or nickle ?</p><p></p><p>I think when I had a copperish look to modern coins there were brass cases in there too.</p><p></p><p>Here are some coins with just CT18 in the water with the pins, done in the rotary tumbler.</p><p>After I decontaminated the Tumbler with CT18.</p><p></p><p>The 1c on the left was VERY toasted with corrosion and hardly recognisable, it is actually shiny and the dirt is shadows in the pitting.</p><p></p><p><img src="https://www.prospectingaustralia.com/forum/img/member-images/8767/1487808770_img_0367.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p><img src="https://www.prospectingaustralia.com/forum/img/member-images/8767/1487808770_img_0368.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p></blockquote><p></p>
[QUOTE="Greenhornet_au, post: 311482, member: 8767"] When I did the CAB I used CA in the rotary tumbler, maybe I will just use a bit of detergent and water to allow them to clean with just the stainless pins, will try one coin first. I will try one in a vibratory tumbler also with a bit of Nufinish polish in the corn cob media. ONLY because they have LOW value I think electrolysis would be damaging unless I pulled Nickle over onto them. Maybe some other light chemicals for the crud that doesnt attack copper or nickle ? I think when I had a copperish look to modern coins there were brass cases in there too. Here are some coins with just CT18 in the water with the pins, done in the rotary tumbler. After I decontaminated the Tumbler with CT18. The 1c on the left was VERY toasted with corrosion and hardly recognisable, it is actually shiny and the dirt is shadows in the pitting. [img]https://www.prospectingaustralia.com/forum/img/member-images/8767/1487808770_img_0367.jpg[/img] [img]https://www.prospectingaustralia.com/forum/img/member-images/8767/1487808770_img_0368.jpg[/img] [/QUOTE]
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Treasure Hunting
Cleaning Your Finds
Cleaning cupronickel coins 1930's French Francs
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