How to Nitre Blue Presented by Larry Potterfield | MidwayUSA Gunsmithing

Published on August 12, 2011
Duration: 1:30

Larry Potterfield of MidwayUSA demonstrates the nitre bluing process for coloring firearm parts. This method involves polishing parts to a fine finish, suspending them, degreasing, and then repeatedly dipping them into a heated nitre bluing salt solution. Close monitoring of color development is crucial, followed by quenching in water. The process concludes with oiling and a 24-hour curing period, resulting in a beautiful royal blue finish.

Quick Summary

The nitre bluing process for firearm parts involves heating a solution of bluing salts to around 650 degrees Fahrenheit. Parts are polished to a fine finish, degreased, and then dipped repeatedly, being removed when a bright blue color is achieved and quenched in water. Finally, they are oiled and cured for 24 hours.

Chapters

  1. 00:02Introduction to Nitre Bluing
  2. 00:15Equipment: Lead Melting Pot and Salts
  3. 00:23Part Preparation: Polishing and Degreasing
  4. 00:35The Bluing Process: Dipping and Wiping
  5. 00:48Monitoring Color and Quenching
  6. 01:05Repeating for All Parts
  7. 01:11Finishing: Oiling and Curing
  8. 01:15Conclusion: Beautiful Colors

Frequently Asked Questions

What temperature is needed for the nitre bluing process?

The nitre bluing process requires a lead melting pot that can easily heat to approximately 650 degrees Fahrenheit. This specific temperature is crucial for the salts to properly react and color the metal parts.

How do you prepare firearm parts for nitre bluing?

Before nitre bluing, firearm parts must be polished to a very fine finish to ensure the best possible color. They are then suspended with fine wire and thoroughly degreased to allow the bluing salts to adhere evenly.

What is the key to achieving a good color with nitre bluing?

The key to achieving a good color with nitre bluing is to closely watch the part as it's in the heated solution. It needs to be removed precisely when it reaches the desired bright blue hue, then immediately quenched in water.

What are the final steps after nitre bluing firearm parts?

After achieving the desired royal blue color and quenching the parts, they are given a coat of oil. It is essential to allow these blued parts to cure for 24 hours before they are installed back onto the firearm.

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