Message:

<p>[QUOTE=&quot;Insider, post: 2714079, member: 24314&quot;]desertgem, posted: &quot;It&#039;s the HOT Rollers I am considering. There must be an excellent reason that they are kept hot, and how hot in regards to the components melting points.&quot;&nbsp; <span style="color: rgb(255, 0, 0)">I guess they were kept warm to help squeeze the metal.</span>&nbsp; &quot;Outside of this discussion, I would think that the heat was to maintain the homogeneity of the mix as it was moved through the reducing stages.&quot; <span style="color: rgb(255, 0, 0)">Once the coinage metal is mixed, poured, and cooled into ingots it can no longer move around to cause the streaks, it can crystalize as it cooled as seen on the Indian cent I posted.</span> So could the wood grain be effects from &quot;cold&quot; rollers, where the metal formed into distinct clumps. since coin metals that aren&#039;t purposely layered (such as zincolns)are bound by &quot;metallic bonds&quot;, they do not tend, to form aggregates &quot;grains&quot; unless they are not cooled properly. Those that have silver soldered know very well the granulation that can form if the heat cycle is not correct.&quot;</p><p><span style="color: rgb(255, 0, 0)">I don&#039;t believe so.&nbsp; Once cooled everything is set.&nbsp; Drawing out the strip can only elongate any stuff.</span></p><p><br /></p><p>mynamespat, posted: &quot;Well, it&#039;s the Canadian mint and from ~2007, but there is a <i>How It&#039;s Made</i> on coins where this process can be viewed.&nbsp; It appears this is a two stage process done with a roughing mill; then a finishing mill.&nbsp; They show the roughing mill moving in a back and forth motion.&nbsp; Pertinent information begins ~1:00. I&#039;d imagine the finishing mill may be a one-way operation due to the length of the sheet.&quot;&nbsp; <span style="color: rgb(255, 0, 0)">I believe you are correct about the finishing mill.&nbsp; Wonder if the Canadian Mint still operates in this fashion?</span></p><p><br /></p><p>GDJMSP, posted: &quot;For years now the mint has received round blanks. Can&#039;t recall for how many but seems like it&#039;s been quite a few.&quot; <span style="color: rgb(255, 0, 0)">Nice to know</span>.</p><p><br /></p><p>&quot;From what I&#039;ve seen it was always done with a forklift. And once it started to elongate and get thing enough, it was rolled into a roll as it came out of the rollers. But that may have only been a video from 1 plant. Like I said, I grant there there are several ways it could be done.&quot;</p><p><br /></p><p><span style="color: rgb(255, 0, 0)">Not enough room on the floor for a forklift when there were rolling mills at the Mint in Philly.&nbsp; When I was in Denver, they did not make anything but coins.&nbsp; Never been to West Point <img src="styles/default/xenforo/clear.png" class="mceSmilieSprite mceSmilie3" alt=":(" unselectable="on" unselectable="on" /> but some friends have.&nbsp; I&#039;ll ask.&nbsp; BTW, the entire mint floor has been changed at Philly.&nbsp; Still no room for a forklift.&nbsp; Probably only used to load ballistic bags.</span> </p><p><br /></p><p>&quot;We&#039;re in agreement. The streaks of genuine woodies are caused by improper allow mix, and as the coin strip is made the different colored metal gets stretched and pulled in all directions, up, down, and sideways. All of that is a given.</p><p><br /></p><p>The questions, the only ones we should be discussing here really are things you pointed out by posting pics of what you did. That being that acid eats away the alloy impurity (the thing that causes the dark streaks) faster than it does the copper. That is a given as well. And that&#039;s why the coin you showed pics of looks like it does. I&#039;ve never seen pics of one where somebody did that by the way. But I certainly understand how and why it happened.</p><p><br /></p><p>Next question, was the guy who did that, used the acid on that coin, a nutcase, or was he somebody like me trying to find out if the coin was a genuine woodie or not?&quot;&nbsp; <span style="color: rgb(255, 0, 0)">Probably a nutcase as the coin was XF/AU and a better date.</span></p><p><br /></p><p>&quot;Last question, is the coin I posted pics of a genuine woodie?&quot;&nbsp; <span style="color: rgb(255, 0, 0)">Not to me - dark lines too even.&nbsp; </span>[/QUOTE]</p><p><br /></p>

Your name or email address:

Do you already have an account?

• No, create an account now.
• Yes, my password is:
• Forgot your password?

Stay logged in