hey, I was wondering if I could get a little info? I have been seeing a lot of coins that people are saying are struck on a sintered planchet. Could someone tell me what that is and how I could identify a sintered planchet if I found one? Fred Weinberg has one listed that is called "Black Beauty" and a couple have sold on Ebay, but I still have no idea what they are talking about. All I can see is a black coloring.
Always remember - Google is your friend Sintered Planchet - AKA Copper Wash - Lincoln cents are made of copper, at least on the outside. Copper is a soft metal, and scraps easily. If a batch of copper cent blanks where annealed in an annealing furnace, it is not unlikely that they would leave some copper dust within the interior of the annealing furnace. If a batch of quarter blanks where annealed immediately following a batch of Lincoln cent blanks, and if the quarter blanks where left in the furnace for slightly longer than ordinary, the copper dust could adhere to the surface of the quarter blanks, giving them a coppery surface. This is what does happen, occasionally. Sintered-coating planchet errors are recognized by their copper colored surfaces and the permanent look of the copper on the coin's surfaces.
Believe me, I know about GOOGLE all to well! But I was confused by the coin in the link above. It doesn't appear copper at all, but black, like it was burned and it is called a sintered planchet.
It is black because it IS burned. Here's the dictionary definition of sintered - v. sin·tered, sin·ter·ing, sin·ters v. tr. To cause (metallic powder, for example) to form a coherent mass by heating without melting. v. intr. To form a coherent mass by heating without melting.
hey the word " planchet " wasen't that a question in this week's contest <~~~~the newbe got it wrong i think
In a hobby called numismatics....is it any wonder that a burnt coin blank is called sintered planchet
The terms "sintered planchet" and "copper wash" refer to theories that were debunked years ago. The currently preferred term is "improperly annealed planchet". Copper atoms migrate to the surface of copper-nickel and copper-nickel clad coins when the planchet is exposed to excessive heat in the annealing oven.
Hi guys .. I have this dime that looks brownish black on both sides no nicks or dents on it with a shinny coat on top really pretty coin which is not seen in the pics sorry i don’t know why but anyway everyone saying environmental damage but for me It hard to believe this coin was ever in the ground everything is perfect on the coin except the color can someone give me there opinions or advice on it ?
