Antique Bronze (US10A): Non-Directional Chemical Patina and Wax Sealing
Engineering Overview: Technical breakdown of Antique Bronze (US10A) non-directional patina conversion on solid brass cylinders for heritage restorations.
Technical & Engineering Specifications
| Process | Controlled Sulfide Patina + Pumice Blend + Wax |
|---|---|
| Substrate | Solid H59 Extruded Brass |
| Appearance | Non-Directional Medium Bronze Warm Sheen |
| Application | Historic Restorations & Heritage Commercial |
| Finish Standard | Antique Bronze (US10A / BHMA 614) |
Heritage Bronze Chemistry
Antique Bronze (US10A / BHMA 614) delivers an organic, medium-dark bronze tone with subtle undertones, distinct from high-contrast relieved finishes.
Chemical Patina Sequence
- Sulfide Immersion: Extruded brass cores are immersed in dilute ammonium polysulfide baths to generate an authentic copper sulfide patina.
- Non-Directional Pumice Blending: Hand-rubbed with volcanic pumice powder to soften highlight transitions.
- Carnauba Wax Seal: Hand-sealed with microcrystalline carnauba wax for a satin tactile feel.
Frequently Asked Engineering & Selection Questions
Q1: What characterizes the US10A Antique Bronze finish?
A subtle, non-directional medium bronze patina sealed with wax, providing an authentic heritage appearance that ages gracefully.