How to Nitre Blue Gun Metal for a Beautiful Finish | MidwayUSA Gunsmithing

Published on July 29, 2010
Duration: 1:32

Larry Potterfield, Founder and CEO of MidwayUSA, demonstrates the intricate Nitre Blueing process for achieving a beautiful, durable finish on small gun parts. This expert guide covers preparation, melting the specialized salts to 650°F, the dipping and carding technique, and final quenching to lock in the vibrant electric blue color. Proper post-treatment oiling is emphasized to prevent rust, ensuring a spectacular and lasting finish.

Quick Summary

Nitre Blueing is a firearm finishing technique that uses molten salts heated to 650°F to create a durable electric blue color on small gun parts. The process involves polishing parts to 800 grit, dipping them into the hot salt bath, carding off crystals, and quenching in water. Oiling afterward prevents rust, ensuring a spectacular finish.

Chapters

  1. 00:00Introduction to Nitre Blueing
  2. 00:16Preparation and Melting Salts
  3. 00:30The Blueing Process
  4. 00:53Quenching and Finishing
  5. 01:09Post-Treatment Care

Frequently Asked Questions

What is Nitre Blueing and what kind of finish does it produce?

Nitre Blueing is a firearm finishing technique used to apply a durable and aesthetically pleasing electric blue color to small metal parts like screws. It's a classic method for adding a touch of class and distinction to firearms.

What temperature is required for Nitre Blueing salts?

Nitre Blueing salts must be melted and maintained at a precise temperature of 650°F. This temperature is critical for achieving the correct chemical reaction and the desired blue finish on the metal parts.

What are the key steps in the Nitre Blueing process?

The process involves polishing parts to 800 grit, melting specialized pink salts to 650°F, dipping parts held on wire into the molten salt, briefly carding off crystals, returning to the bath until colored, and finally quenching in water.

Why is it important to oil gun parts after Nitre Blueing?

Oiling the gun parts immediately after the Nitre Blueing process is essential to protect the newly applied finish from rust and corrosion. This step ensures the longevity and appearance of the beautiful blue color.

More from MidwayUSA

View all →