Will other acids (like lemon juice or orange juice) work as well?Ģ. you pour some oil into a small dish you immerse the coin (or coins) into the oily bath for a few minutes and let them soak you take the coin (or coins) out and carefully work on them either with a cotton swab or with a cotton bud. To make it a true experiment, you can try to answer these questions:ġ. Place one or two nuts and bolts in the vinegar and watch – they may become COPPER in color! The vinegar removed some of the copper from the pennies, if there is enough copper in the vinegar, the copper will become attracted by to the metal in the nuts and bolts and they will take on a new copper color – cool.
Add enough acetic acid (vinegar, white vinegar is most recommended) to moisten. Rinse with water to remove the TSP residue. In a small container, place a small amount of table-salt (1 gram is plenty). Put the coins in this solution for five or ten minutes to remove oil residue. In time the pennies will turn greenish-blue as a chemical called malachite forms on your pennies. Get a container (coffee mug is good), fill with one cup of warm water and add 1 tablespoon of TSP (tri-sodium phosphate), which is available in most paint stores. You’re not done yet, though, lets try another experiment:Īdd more pennies to the bowl for 10 seconds, but this time, don’t rinse them off. It turns out that vinegar is an acid, and the acid in the vinegar reacts with the salt to remove what chemists call copper oxide which was making your pennies dull. There is some pretty fancy chemistry going on in that little bowl of yours. 1 What is the best way to preserve coins I use to soak in olive oil if they started to flake before I got them home and it helps sometimes to see dates and detail better but now I just lightly brush in field and left over dirt shows what I think is just as nice details. Admire their shininess! How does it work? The bubbles start to work almost instantly by agitating the dirt right off the coin. Or, cover the coins with ketchup and brush them with a soft-bristled toothbrush. Take out the pennies and rinse them out in some water. Hydrogen Peroxide Soak: This method is probably the neatest one to watch. Things You Should Know Mix 14 c (59 mL) of white vinegar with 1 tsp (5.69 g) of salt in a small bowl. Put about 5 pennies into the bowl and count to 10 slowly. Pour the vinegar into the bowl and add the salt – stir it up.
0 kommentar(er)
