色・発色
silver reaction
Japanese: 銀反応
Silver foil and silver wire react with the glass to produce a yellow to brown coloration (silver stain).
Learn More
A silver reaction is a phenomenon in which glass containing silver components undergoes a chemical reaction with adjacent glass during firing, resulting in unique color changes or patterns at the interface. Silver ions move easily during glass melting and react with copper, cobalt, sulfur-based components, and others to produce complex colors such as orange, yellow, brown, and black.
The Alchemy Series (alchemy-series) is a technique that intentionally utilizes the silver reaction; it is a sophisticated method of expression that allows one to enjoy unpredictable color changes. Since the intensity of the reaction varies depending on the silver content, the composition of the adjacent glass, the firing temperature, and the firing time, it is important to verify the behavior using test pieces.
Related Concepts
See “Silver Foil,” “Copper-Bearing Glass,” “Reaction Line,” and “Alchemy Series.” Always assume that unintended color changes may occur next to glass containing silver.
This entry is written in Japanese by Rei Chikaoka and translated for readers outside Japan. If something reads oddly, the original is the source of truth.