If you want to keep the value as high as possible, don't tone them. A red (RD) cent is more valuable than a red brown (RB) cent which is what you will have if you let it tone significantly and might color grade to a brown (BN) which is yet lower in value.
On the other hand some people pay a premium for toning. Some lime myself prefer an evenly toned coin of one or two colors and others like a rainbow toned coin. There is a market for everything.
You cant lose keeping them red if you're talking about a copper coin.
On the other hand some people pay a premium for toning. Some lime myself prefer an evenly toned coin of one or two colors and others like a rainbow toned coin. There is a market for everything.
You cant lose keeping them red if you're talking about a copper coin.


















