How To Artificially Age A Coin?

Instructions
1
To create a green patina: 2 parts white vinegar, 1 1/2 parts non-detergent ammonia, 1/2 part non-iodized salt.
Clean your copper first.
Mix the ingredients together in a spray bottle and set aside.
Spray on a light coating of Windex. Do not wipe off.
Spray your vinegar/ammonia/salt mixture onto the copper and allow it to dry 1 hour. Reapply to any areas that you may have missed.
Allow to sit overnight.

2

If you are in a high humidity area, you can leave the copper uncovered.
If you are in a low humidity or desert climate, cover the treated cover with plastic to keep the moisture in.

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3
You will now have a powdery green finish. Don't rub off, as it will continue to age/cure.

4
If you want to darken your copper, but not add the green patina:
Use a spray bottle with 1 part baking soda to 2 parts HOT water.
Now spray your copper and let dry.

My experiment.

https://goccf.com/t/133600

If you bury it it will take a while to get that aged look. But, it will eventually come out looking quite aged.

HH

Out of many experiments I've found the best method is to just place a coin on a kitchen window sill, on the inside, on a piece of raw wood. It will take time and many things effect the results. For example how often is cooking done. How often is the window opened. Type of cooking done. Such systems do take time but create a natural looking aged coin. Must remember to turn over occationally.