Steel Blue Opalescent 000146

Contains

Copper

May React With

Selenium, Sulfur

Cold Characteristics

Consistent color.

Working Notes

At tack fusing temperatures, the surface frequently develops a metallic gray film. This usually disappears at full fusing temperatures. To avoid metallic filming, use an overglaze or cover with thin clear glass. To maintain the metallic effect, fire as quickly and low as possible. Consider stencil spraying of an overglaze to create patterns of metallic and non-metallic blue. Dark interface reaction likely with sulfur glasses (001137, 001437, 000137). Learn more by reading Special Effects: 0146 Steel Blue.

Cold Characteristics

Opaque. Can have a dry surface.

Working Notes

Torch: Keep the glass blue by working it in a neutral flame throughout the process and keep it uniformly heated. Develop a matte metallic surface on this glass by forming the glass in a neutral flame; next change the flame to a reducing atmosphere by turning down the oxygen. At this point the surface should begin developing a metallic quality. Then turn off the oxygen completely, and build up a layer of carbon on the glass. Put the piece away in the annealing kiln with this carbon layer on it. Once removed from the kiln, the carbon is easily removed to expose a matte metallic surface. If you return the carbonized piece to a neutral flame, the metallic surface will disappear.

Kiln: Working properties and kilnformed characteristics are consistent with sheet glass. See sheet glass notes for this style.