Aluminium Bronze Coin Color - Coin Community Forum

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Author	Replies: 6 / Views: 1,051
chronos Pillar of the Community Lebanon 502 Posts	Posted 09/22/2021 10:38 am Hello I know that aluminum bronze coin are yellow in color ,but I have seen a one red like bronze color with few tiny spots of yellow, the coin doesn't looked as damaged it contains all the details , could it be soaked in a sort of chemical material that removed the yellow color or it is an error coin? Report this Post to the Staff

JimmyD Bedrock of the Community Canada 21584 Posts	Posted 09/22/2021 10:45 am No way it could be an error, striking of a coin does not change the colour. Anything could have happened to it after it left the mint. Environmental toning, chemical reaction etc. It would be almost impossible to know what caused it. Does it really matter as no matter what it was, it is still damage. Edited by JimmyD 09/22/2021 10:47 am Report this Post to the Staff
Dorado Bedrock of the Community Canada 24885 Posts	Posted 09/22/2021 11:27 am Report this Post to the Staff
OldSilverDollar New Member United States 27 Posts	Posted 09/22/2021 6:38 pm Not sure I want to say Distilled Water for three days with water changed daily in a glass jar and sealed lid away from any heat source then rinse with distilled water and dry quickly with a blow dryer. Acetone not sure if it's safe with aluminum bronze? Report this Post to the Staff
sel_69l Bedrock of the Community Australia 21786 Posts	Posted 09/22/2021 9:48 pm Most probably not an error coin, with the wrong alloy. I have seen white metal copper nickel coins in high grade tone to a golden yellow tone, despite the intention that they remain white, to simulate the color of silver coins. To give a copper coin a yellow color, it is alloyed with around 6% to 10% aluminum, the remainder nickel to harden the alloy. Nevertheless, *given the right environmental conditions,* such as burial for a few weeks in acid soil, aluminum bronze coins can tone to a bronze brown color, despite the intention that they remain yellow, to simulate the color of gold coins. The only way to prove the alloy would be XRF testing. However, unless you have substantial independent supporting evidence to suggest that wrong alloys may have been used in error, the fees for XRF testing would not be justified. Report this Post to the Staff
spru Bedrock of the Community United States 12477 Posts	Posted 09/22/2021 11:39 pm Pics would help. In Memory of Crazyb0 12-26-1951 to 7-27-2020 In Memory of Tootallious 3-31-1964 to 4-15-2020 In Memory of T-BOP 10-12-1949 to 1-19-2024 Report this Post to the Staff
just carl Bedrock of the Community United States 20753 Posts	Posted 09/24/2021 1:22 pm As noted please supply photos of that coin. Report this Post to the Staff
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