Improperly Mixed Alloy - Coin Community Forum

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Author	Replies: 7 / Views: 2,016
jungliston1 Valued Member United States 305 Posts	Posted 06/16/2013 02:41 am Hello all, I found this while roll searrching quarters and it looks to be improperly mixed alloy. Just wondering your thoughts on it. I have never seen one like this. The lines you see are on both obverse and reverse and are in the planchet, not on it. Thank you for thehelp. Edward M. Report this Post to the Staff

Murphy Valued Member United States 381 Posts	Posted 06/16/2013 3:46 pm I found a Kennedy half similar to that back in December. Here is the link. https://goccf.com/t/22710&whichpage=884 My Brother looked at it back then and said it was planchet striation. He knows far more than I do. I never looked into it anymore. I just saved the coin because I liked the way it looked. I really don't know what causes it. Report this Post to the Staff
mikediamond Pillar of the Community United States 2737 Posts	Posted 06/17/2013 07:22 am Some claim they're roller marks, others striations from rotating descaling brushes used on the coin metal strip. No one really knows. But I'm pretty confident it's not an alloy issue. Error coin writer and researcher. Report this Post to the Staff
bookshelf Valued Member United States 144 Posts	Posted 06/17/2013 11:08 am I've come across a number of pennies with similar markings. It will be interesting to hear what other have to say what might cause them. Report this Post to the Staff
biokemist6 Bedrock of the Community United States 12437 Posts	Posted 06/17/2013 12:52 pm I have always referred to it as "roller marks", formed when the thickness of the metal stock sheet is being set. Alloy issues should be streakier, not manifested as thin perfectly parallel lines. Report this Post to the Staff
Murphy Valued Member United States 381 Posts	Posted 06/17/2013 2:56 pm Thanks mikediamond and biokemist6. I was hoping that some of the experts would answer this question. I have always wondered what caused this. Wouldn't this mean that the entire sheet, or at least a big portion of the blanks from that sheet, have similar markings? Do the inspectors attempt to pull these imperfect blanks out before they become planchets and then on to finished coins? Report this Post to the Staff
biokemist6 Bedrock of the Community United States 12437 Posts	Posted 06/17/2013 4:08 pm With either rollers or descaling brushes, the entire roll of metal stock would be affected which would produce thousands of blanks with the lines. I do not think there would be any practical way to screen out these blanks/planchets since the lines are not usually readily apparent on a BU coin but become much more prominent after the coin had been oxidized a bit. Report this Post to the Staff
Conder101 Bedrock of the Community United States 17884 Posts	Posted 06/18/2013 1:27 pm No reason to pull them out, they still spend and the vending machines like them just fine. They are "defective" as far as collecting, but not as coin of the realm. Report this Post to the Staff
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