Project Lincoln Chemical Reaction! - Coin Community Forum

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Author	Replies: 7 / Views: 2,204
brixxx27 Valued Member United States 123 Posts	Posted 12/26/2013 4:53 pm Hello to all forum members. I have been doing a project on the reaction of certain chemicals and substances on lincoln cents. it will give me an idea of how the cents look after application of these products.i will post pictures of them before and after, thus able to share the knowledge obtain from this project and its results. thanks for your time to read the post. salt -n- vinegar aplicattion sodium fluoride application i will be posting more pics with differents types of chemicals and the reaction of cents with it. Report this Post to the Staff

Pertinax Pillar of the Community United Kingdom 2133 Posts	Posted 12/26/2013 5:29 pm What matters too, is how are you are applying it. For example, Are you using a bristle brush, cloth, fingers, cotton bud ? Are you scrubbing the coins, gently applying solution or just bathing them. Report this Post to the Staff
brixxx27 Valued Member United States 123 Posts	Posted 12/26/2013 6:51 pm its true,i bathing the 1968 and 1994 on vinegar and salt i apply the sodium fluoride with a soft bristle brush in 1973 and 87. Report this Post to the Staff
Normic67 Pillar of the Community 798 Posts	Posted 12/27/2013 01:37 am I sure am glad you arnt using UNC IHC`s. I've done this before, it`s very interesting. Ketchup and coca cola have the exact same reaction of the first two. Report this Post to the Staff
Conder101 Bedrock of the Community United States 17884 Posts	Posted 12/27/2013 3:42 pm To make any comparison valid there needs to be standards of application/treatment, and the pictures need to be better and also standard. All shot with the exact same lighting, position, and settings. The photography requirement can be a killer because very slight changes in the lighting or positioning can result in big changes in appearance of the final image even if nothing is done. Report this Post to the Staff
brixxx27 Valued Member United States 123 Posts	Posted 12/27/2013 6:47 pm True, the photos will not ultimately show the real result of the project. I'm using a camera phone to take the pictures. but I try to do my best. filters light and camera pixels are not the best that is obvious but as I said is to have an idea of how they would look. Thanks for your time given to read and post yours opinions. Report this Post to the Staff
just carl Bedrock of the Community United States 20753 Posts	Posted 12/28/2013 9:01 pm Your results are rather meaningless. To really get decent results, you must document the strength of all solutions you use. The period of time of submersion. The temperatures at the time of submersions. All coins used should be the same date and condition otherwize substances on one coin may be different than on others. You should look up the materials used to make a coin since coins of different periods were made differently. Such precautions in experimentation is a necessity since any variations in the above will get different results. This is the reason for what is called Quality Control in Chemistry laboratories. Report this Post to the Staff
Conder101 Bedrock of the Community United States 17884 Posts	Posted 12/29/2013 06:20 am Coins should probably also be greased with acetone before the soaking to remove any contaminants that might affect the reaction between the coins and the soaking solution. As you can see in order to be meaningful, it is not a simple proposition. Report this Post to the Staff
	Replies: 7 / Views: 2,204

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