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Thread: Copper sulfate as marking out dye

Mar 14, 2023, 11:46 AM #1

mklotz

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Copper sulfate as marking out dye

Dykem is not very satisfactory for marking lines on a lathe tool bit while grinding to shape. The rough and tumble action of grinding and cooling easily removes the marking fluid and the lines. If you can get your hands on a solution of copper sulfate, dip the tool in that. A light coat of copper will deposit on the tool and it shows scribed lines well. The electrochemical bond is stronger than that of marking out dye and your marks will survive longer.

Copper sulfate crystals and solution are available on the web from Amazon and other suppliers.

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