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Type: Posts; User: john.k

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    Black phosphating may be a much quicker and...

    Black phosphating may be a much quicker and easier approach for small parts.
  2. Replies
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    2,712

    Cold blueing is just about a waste of...

    Cold blueing is just about a waste of time/money.....rubs off quite rapidly in use........The solid blue/ black is done with hot caustic solution blues at around 200F in a tank......Incidentally...
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