Message:

<p>[QUOTE=&quot;352sdeer, post: 2920701, member: 91351&quot;]Okay I’ll chime in again. Being a 45 year plus numismatist and a Mill Wright for years working with large German platten presses and modern CNC machines gives me a good working knowledge of how&nbsp; these machiney thingies work.</p><p>1. Planchet damage. I looked at it close and IF ALL the striations are above the field then die&nbsp; &nbsp; damage. If not then I’m not certain but I lean away from my earlier feeder statement.</p><p>2. Planchet contamination. One big point every one is missing is that “detergent” is not a single elemental compound but usually a VERY complex combination of simple and complex chemicals each design to do a different job. These detergents and cleaners are not like the ones you can buy at the store. They do A couple of specific duties usually and that’s it. Think of it this way. When I am extra dirty from what ever and I take a bath I use soap. When I’m done I get out and I use a towel to dry off. I think im clean but am I? Let look and see. When I drain the tub 95% of the soap an dirt are in the solution, soap and water. The other 5% is either stuck to the tub walls, the towel or me. I can’t see the spots on me but if I was bright copper boy howdy I’d be spotty. Now look at our spots. The process that puts the spots on is only the final rinse. These guys have had a couple of chemical baths in the planchet preparation process already. I believe that this last rinse solution to be one with an extremely high surfactant ratio and a fast evap rate. Probably not much detergent as the the major cleaning is already done. They just want the surface to fall within the specifications that the mint sets. You know the lowest bid and all. So they don’t filter and change the solution as often as the should and, BOOM SPOTS. That’s my theory. </p><p>3. Press mayhem. I didn’t have any coin presses to work with but did have a couple old 100ton sample presses we could cycle up pretty fast ( 30 cycles a minute ) V. Kurt is right when those presses are rolling it’s amazing I’m sure. The dirt and the crud build in the press is constant I bet you&nbsp; can’t belive the build up you get. And no matter how clean your materials are it just happens! But no I don’t think that has anything to do with he spots. The spots cause the build up. oryou pick</p><p>Now boys this is just a working theory. Nobody is referenced here it’s all me.[/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