Birchwood Technologies Launches 8 oz and 32 oz Patina Products on Amazon

Eden Prairie, MN, December 22, 2025 – Birchwood Technologies has expanded the availability of its metal finishing line with ten new SKUs, now available in individual units on Amazon and in full case quantities for authorized dealers. In response to demand from industrial manufacturers, architectural finishers, and independent artisans, the company is now offering five of its flagship patina and blackening formulas in 8 oz and 32 oz sizes.

These sizes are available for the following products:

• Presto Black® Steel PC9: For blackening steel.
• Presto Black® SSB: For blackening stainless steel.
• Antique Black® M24: For darkening copper, brass, and bronze.
• Antique Brown: For a brown finish on copper, brass, and bronze.
• Aluma Black®: For blackening aluminum.

The introduction of 8 oz and 32 oz bottles on Amazon is intended to make these finishing chemistries more accessible for smaller projects, prototyping, and touch-up work.

For those interested in becoming an authorized dealer for these retail-ready sizes, please submit an authorized dealer inquiry.

For more information on these products and their applications, visit www.birchwoodtechnologies.com or visit the Birchwood Technologies Amazon Storefront.