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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 gold where it is in contact with the glass. Sample tile above illustrates firing silver foil uncapped on top of 001015 (left), and fired between Clear and 001015 layers with 001015 as the cap (right). Faint blue color may be evident in fired works.

Expect variations in effects. Reactions range from pale yellow to warmer gold hues. Variations can result from different sources and thicknesses of silver, glass production runs, and heatwork. This includes firing times, temperatures, and multiple firings.

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

In Quality Control testing, this glass is evaluated once fired to a full fuse with a recommended soak at 1225°F.

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

The iridescent coating acts as a resist, which can prevent reactions with silver foil. When firing silver in contact with the iridescent coating between lawyers, we have observed subtle to no reactive effects. Subtle reactions may develop where there is greater contact, such as through thinner sections of the coating (gold, silver) and minute fissures throughout. There is little contrast between these reactions, when present, and the silver.

We do not recommend firing silver foil on top of iridescent coatings on the surface of a piece, as it does not adhere well.

Reactions are stronger and more predictable when firing silver in contact with the non-iridized side of the sheet glass. Expect variation.