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Intermediate Quiz: What caused these marks?
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<p>[QUOTE="Insider, post: 4848499, member: 24314"]<span style="color: #b300b3">These marks were caused when </span><span style="color: #000000">black srteaks of terminal oxidation</span><span style="color: #b300b3"> caused by (?? I was not there.) were removed. The surface was turned back to a silver shade of color but the surface under the corrosion was terminally etched. This type of mark is the only evidence that usually remains on a terminally toned surface (</span><b><span style="color: #000000">Black</span></b><span style="color: #b300b3">) when the coin is PROPERLY Cleaned. </span></p><p><span style="color: #b300b3"><br /></span></p><p><span style="color: #b300b3">I'll post photos of terminal toning streaks that will leave the same mark on Tuesday. </span></p><p><span style="color: #b300b3"><br /></span></p><p><span style="color: #b300b3">Note: The surfaces and overall appearance of a corroded surface, strike thru, planchet flaw, or PMD are different. This quiz is tough because it has characteristics of a strike thru or planchet flaw. I'll post some additional images of these characteristics as quizzes until the difference becomes easier to see. It is better for everyone if you know the answer (like Paddy in this case) that you KEEP IT TO YOURSELF so more members will have a chance to think the problem through until someone gets the answer. </span></p><p><span style="color: #b30000"><br /></span></p><p><span style="color: #b30000">It is no fun <img src="styles/default/xenforo/clear.png" class="mceSmilieSprite mceSmilie3" alt=":(" unselectable="on" unselectable="on" /> and a big waste of time <img src="styles/default/xenforo/clear.png" class="mceSmilieSprite mceSmilie40" alt=":dead:" unselectable="on" unselectable="on" /> for me if I post a quiz that is answered in the first or second post. So if I post PMD and you know it <img src="styles/default/xenforo/clear.png" class="mceSmilieSprite mceSmilie50" alt=":happy:" unselectable="on" unselectable="on" />, please <img src="styles/default/xenforo/clear.png" class="mceSmilieSprite mceSmilie66" alt=":muted:" unselectable="on" unselectable="on" /> let the quiz run for a while. I'll keep it moving with questions to encourage posts from the "lurkers" <img src="styles/default/xenforo/clear.png" class="mceSmilieSprite mceSmilie18" alt=":bag:" unselectable="on" unselectable="on" /> until we get an answer. Thanks for letting me have some fun too. <img src="styles/default/xenforo/clear.png" class="mceSmilieSprite mceSmilie8" alt=":D" unselectable="on" unselectable="on" /></span> [/QUOTE]</p><p><br /></p>
[QUOTE="Insider, post: 4848499, member: 24314"][COLOR=#b300b3]These marks were caused when [/COLOR][COLOR=#000000]black srteaks of terminal oxidation[/COLOR][COLOR=#b300b3] caused by (?? I was not there.) were removed. The surface was turned back to a silver shade of color but the surface under the corrosion was terminally etched. This type of mark is the only evidence that usually remains on a terminally toned surface ([/COLOR][B][COLOR=#000000]Black[/COLOR][/B][COLOR=#b300b3]) when the coin is PROPERLY Cleaned. I'll post photos of terminal toning streaks that will leave the same mark on Tuesday. Note: The surfaces and overall appearance of a corroded surface, strike thru, planchet flaw, or PMD are different. This quiz is tough because it has characteristics of a strike thru or planchet flaw. I'll post some additional images of these characteristics as quizzes until the difference becomes easier to see. It is better for everyone if you know the answer (like Paddy in this case) that you KEEP IT TO YOURSELF so more members will have a chance to think the problem through until someone gets the answer. [/COLOR] [COLOR=#b30000] It is no fun :( and a big waste of time :dead: for me if I post a quiz that is answered in the first or second post. So if I post PMD and you know it :happy:, please :muted: let the quiz run for a while. I'll keep it moving with questions to encourage posts from the "lurkers" :bag: until we get an answer. Thanks for letting me have some fun too. :D[/COLOR][COLOR=#b300b3] [/COLOR][/QUOTE]
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Intermediate Quiz: What caused these marks?
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