The saline solution is used to neutralize any acid that gets where it shouldn't. Keep a bath of salty water handy, your salty water should be a 100% saline solution, that means that you cannot dissolve any more salt into the water. Peel the paper off and rub the paper residue from the board with your fingers.Īctually, there are plenty of them. While the copper is still hot, drop it into a hot bath of water.
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