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Require formula for making cold bluing/black oxide liquid

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HELLO I REQUIRE A FORMULA FOR A SUCESSFUL COLD BLUING LIQUID, FOR BLACK OXIDING FERROUS COMPONENTS I BUILD, ALSO A SEALER FORMULA WHICH PREVENTS RUSTING AFTER BLUING.

TIM SWAIN
- STH AUCKLAND, NEW ZEALAND

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You'll find some introductory and general material in the Metal Finishing Guidebook, Tim. Searching expired patents will offer additional specifics. But asking for a "successful" formulation for a commercial product is rather like asking for the formulation for Coca-Cola or Beefeater's.

Ted Mooney, P.E.
finishing.com
Brick, New Jersey

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