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Peter McMillan Elite user St. George, Utah 497 Posts |
I use vinegar and salt for aging copper and brass in my props. One 1/2 cup vinegar to 1 table spoon salt. Let salt dissolve.
Dampen plain white paper towel or tissue. Any embossing or air bubble will transfer to the metal surface and patina will be illregular. Wrap item in dampened paper towel or tissue, smooth paper over metal surface and place in sealable plastic bag and let sit over night. Conversely, if my english pennies are too dark, I dunk them in ketchup over night. They do not come out real shinny, more of a flat/satin copper look.
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~ www.SantaPeteUtah.com |
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CarpetShark Special user 576 Posts |
I find it strange that your coins are not darkening on their own. I purchased a Hopping Halves set from Johnson less than a year ago, and already the english penny and [s are darkening nicely. The strange thing about this is I store the gaffs in the plastic coin sleeves they came in; I assumed this would slow the darkening process down... live and learn.
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Taterini Special user 604 Posts |
I find that different people have different body chemistry and the oils that their hands produce differ from person to person. I loaned a Fender Strat that I had owned for about 15 year to a friend I was playing music with. After he played it for about a month I had to change out all the metal on the body from the strings to the bridge and even the pickguard screws. Needless to say he did not play any of my guitars after that! The chemical reaction with his hands just ate the metal up... so the fact that our coins do not age at the same rate should not be a surprise.
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Tree Loyal user Wiggle Wiggle 295 Posts |
A mixture of Liver of Sulfur and Coffee creates the darker brown on copper.
Won't give the % of each because I'm giving away my jewelry making secrets. |
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Brad Jeffers Veteran user 377 Posts |
Quote:
On May 23, 2014, CarpetShark wrote: Just check a random sampling of pennies and you will see that it apparently takes quite a while for a coin to achieve a nice patina. Many pennies that have been in circulation for over 20 years are still rather shiny. |
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karnak Special user Connecticut 747 Posts |
Never got around to experimenting with any chemical methods, but I recently read (in an old kids' book of chemistry experiments) that baking them in an oven (on a cookie sheet lined with aluminum foil, at 400 degrees F for at least 30 minutes) will turn shiny new pennies brown. Anyone ever try this method?
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BCS Inner circle 1083 Posts |
Karnak... I have never tried the oven to turn pennies brown, but I have don it with several copper Cups & ball sets. Make sure the coins are completely clean, even the oils from your fingers can affect how the copper will change color. after about 20 minutes check the color.... The Cups went through many different hues.
As to coloring copper pennies, I have always used Palmmolive dish soap and hot water. Rub the soap well into the coin and let it sit for an hour or so. Rinse it off well and repeat until you get the color you want. Also rub the doing with a soft cloth to give the new brown patina a worn look. Good luck, Bruce |
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