Ferric chloride is most commonly used for etching PCB boards. Mix the solvent with warm water and your etching solutions is ready. You can also store and reuse the solution._x000D_\n
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Why ferric chloride is used in PCB etching?
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Ferric chloride is a corrosive, acidic chemical compound that will eat away all copper on the board that is not protected by the marker's ink. Pour a modest amount of ferric chloride into a plastic container with a lid; just enough to cover the board completely.