Is it possible for a coin to be sintered on one side only?? I have a 2007P Adams coin that seems to be sintered on the reverse side and edge only. The obverse is normal. The reverse is sintered a strong gold/copper tone...if its sintered at all. Is this possible? Nana
I have to admit that I'm confused by the pictures. The coin on the left appears to be a normally colored coin. The coin on the right is definitely the wrong color and appears as if it was struck on a copper/nickel planchet. But I do not see anything that even remotely looks like a sintered coin. Which one is it that you think is sintered - the left or the right ?
i didnt know either- sin·ter (sntr) n. 1. Geology A chemical sediment or crust, as of porous silica, deposited by a mineral spring. 2. A mass formed by sintering. 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
The coin on the top left is the coin in question. I don't know if its sintered, thats why I'm asking. It is a very strong gold or copper color, but only on the reverse. The obverse is the normal color! The lower or left coin IS the normal coin. I know it looks more silver but it isn't. Its the normal colored Adams coin. I'll try to post more pics.
Tell ya what, post a pic of just the coin you think is sintered. But post pics of both the obverse and reverse so we can see the color difference you mention. I ask this because on my monitor the coin you are asking about is the normal color. To answer the question of the others - a sintered coin is one where a thin layer of copper is deposited on the coin during the annealing process. Planchets are placed into an oven to heat them up and make them easier to strike. In the oven there is copper dust left over from all the planchets that contain copper. And sometimes this copper dust gets deposited on planchets that are not copper colored and makes them look like they are copper colored. That's about all there is to it.
Sorry it took so long! I've been down with the flu. No where you want to be. Anyways, I'm feeling much better. Here are the photos of the single 'sintered' or whatever it is coin. The weird gold or copper color is on the Reverse....
I Wish I Had A Better Camera, But Heres More...! Can You Help Me Out?? As I Stated Before, The Side In Question Is The Reverse.........thanks!!
Not sure just what you are seeing, but it is not sintered. If it were, It would be somewhere between porous and grainy. As stated above, a sintered coin is made from powdered metal. It is fused together mostly by pressure. Although the pressure creats heat, it is not fully melted together and thus retains at least some of the grainyness of a powder.
I dunno, maybe it's just my monitor, but the reverse color looks normal to me and the obverse color looks way too pale - it almost looks like a clad coin. I'm confused over this one. But I feel confident it is not a sintered coin.
The Obverse is the normal color as the other JAdams coins I compared it to. Its the Reverse thats the puzzler. It almost looks like theres a small burn on it. Believe me when I say, the color of the reverse is very very coppery or deep deep gold. Oh well...I guess I'll just put it away for now. I don't really think its sintered either. I just didn't have any other explanation. Thanks for all your help, guys!! I really appreciate it. Nana
