About Amazon Bronze, 287

Amazon Bronze is a metal-rich borosilicate glass that develops deep reddish browns with metallic surface effects ranging from copper to rainbow iridescence.

Loaded with metals—often visible as fine strands in the rod—it responds strongly to flame atmosphere. In a neutral flame it builds dense browns and reds, while a reducing flame brings metallic luster to the surface.

Repeated kiln cycles produce layered finishes of blues, purples, cream, and green over the darker base, adding depth and variation.

Designed by Glass Alchemy co-founder Henry for Susan, inspired by the look of Japanese ceramic glazes.

A dynamic choice for lampworking artists who want a reactive color with a living, evolving surface.

Working Tip: Flame or kiln strike 1075F. Work neutral; reduce at end for metallic effects.

Artist Description by Mike Shelbo:

"The potential for variations of finishes is the best part about Amazon Bronze.

I usually work the glass in the center of the distance between my torch tip and the end of the flame (the neutral flame zone), leaving me with a deep reddish brown. Then when the piece is completed and ready to put away I will increase propane in the flame and flash the piece in and out of the fire to bring the metallic reduction to the surface. This has yielded metallic colors ranging from a shiny copper penny to a beautiful rainbow iridescence.

You can also repeatedly kiln your finished piece at 1040F to 1100F to achieve a metallic effect, leaving a slight luster finish of blues and purples and sometimes cream and green on top of your underlying dense browns and reds. Amazon Bronze looks awesome without being encased or underneath clear or other transparent colors." - Mike Shelbo