The Lost Colt Finish: Carbonia Bluing vs. Charcoal Bluing

Описание: Carbonia Bluing vs. Charcoal Bluing: The Lost Art of Colt WWI Finishes
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What is the real difference between Carbonia Bluing and Charcoal Bluing?
In this video, Paul from RGS Restorations—who personally finished over 4,000 Colt WWI reproduction pistols (2003-2006)—breaks down the history, chemistry, and industrial reality of the Carbonia process.
Unlike modern hot bluing or rust bluing, Carbonia Bluing (also known as Machine Bluing) was a proprietary gas furnace process developed by the American Gas Furnace Company. It creates a finish that is not just a color, but a carbon-impregnated surface hardening treatment that gives early 20th-century firearms their distinct "slick" feel and durability.

Key Topics Covered:

• The Process: How the "Rotary Gas Retort" works using bone charcoal and Carbonia oil.
• The Myth: Why Carbonia bluing is often confused with Charcoal bluing (a completely different pit-fire process).
• The Industry: How companies like Colt, Winchester, and Savage tweaked the process for different results.
• The History: Paul’s personal experience finishing the 1911 WWI Reproductions for Colt.

From the RGS Restorations Archive:
This video features exclusive primary source documents and high-resolution visual evidence, including:

• Original Colt Memos & Manifests: Correspondence from my time finishing the 1911 WWI Reproductions (2003–2006).
• American Gas Furnace Co. (AGF) Equipment: A look at the vintage rotary retort furnaces used in the Carbonia process.
• The Role of Carbonia Oil: Technical context on the specific high-flashpoint oil mixture used in the original Carbonia formulas to achieve the signature Colt blue.
• Macro Photography: Ultra-close-up comparisons of Carbonia vs. Charcoal bluing on period-correct hardware and firearms.

Chapters:
00:00 - Intro: WWI Pistols & Antique Can Openers
00:23 - Finishing 4,000 Colt WWI Reproductions (2003-2006)
01:03 - Carbonia vs. Charcoal Bluing: The Big Difference
01:50 - The Charcoal Bluing "Pit" Method
02:20 - The Carbonia "Rotary Retort" Method
02:50 - The Secret Ingredient: Cylesso Oil
03:16 - Carbon Nitriding & The "Slick" Feel
05:16 - Winchester vs. Savage: The "Flaky Black" Finish
06:10 - Why Colt Polishing is Superior
07:03 - Patina: How Carbonia Ages Over Time
07:58 - Industrial Carbonia: Tools and Hardware
09:04 - Machine Bluing & Oily Cork Tumbling
11:17 - 110°F Shop Days: The Reality of the Craft

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#GunSmithing #Colt1911 #CarboniaBluing #Restoration #FirearmsHistory #Cylesson

EDUCATIONAL & HISTORICAL NOTICE:
This video documents the professional restoration and historical study of antique firearms. All activities are performed by a trained professional in a controlled environment following all local and federal laws. This content is intended for documentary and artistic purposes only. We do not provide instructions on the manufacture of firearms or ammunition, nor do we sell or link to the sale of firearms or regulated accessories. Do not attempt to replicate any activities shown.