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Alchemy Clear, Silver to Gold 001015

  • Sheet Glass


Reacts With


See our Bullseye Reactive Potential charts for more information

Cold Characteristics

Unfired sheet has a faint blue tint.

Working Notes

Upon firing, silver foil turns a golden color wherever it is in contact with 1015 (Alchemy Clear). On the sample tile above, the left side illustrates silver foil after being fired uncapped on top of 1015. The sample’s right side illustrates silver foil after being fired between a layer of Clear (any style) and 1015, with 1015 as the cap. (Faint blue color may be evident in any fired work containing 1015.)

Expect variations in effects to result from different sources and thicknesses of silver, glass production runs, and heatwork (including firing times, temperatures, and number of times fired). Due to the range of variation in this glass, we suggest testing before beginning a specific or large project to ensure the result you desire.

For color development, we recommend a 1 hour soak at 1225°F in the pre-rapid heat section of a firing cycle.

Note: When firing silver foil in the kiln, be aware that the silver reaction can travel across the glass surface and onto the kiln shelf, potentially affecting silver-sensitive glasses in one or more subsequent firings. This can happen even when new shelf release (paper or primer) is applied to the kiln shelf. When fired between layers, silver is generally more contained and less likely to affect the firing surface.


Pictured: Cap: 001016-0031 Alchemy Clear, Silver to Gold, with rainbow iridescent coating. Irid up. Base: 3mm Tekta Clear. Silver foil between layers.

001015-0031 Alchemy Clear, Silver to Gold, with rainbow iridescent coating

Because iridescent coating acts as a barrier, don’t expect much reaction when using silver directly against this coated glass. That said, the silver might still make contact with the glass through thinner sections of the iridescent coating. This may result in pale gold effects caused by 1015’s silver reactivity, detailed above. Results vary widely, both in terms of the effect’s strength and color.