Glass and Brass in Patina Blue Through kiln casting and blown glass techniques, Nobuko Soda explores the interaction of glass and brass. Oxidation transforms brass into deep patina blue, leaving traces of time and change within transparent glass. View Works Featured Works Blow-Fire Transformation through fire and time. Comush A miniature world shaped by glass and patina blue. Blue Clouds Blue forms suspended within transparent glass. Blue Depth Layers of transparent glass create quiet depth and blue. Patina-Scape Landscapes inspired by the traces of time and oxidation. Patina Blue The distinctive surface created by the reaction of glass and brass.