Bullseye Stiff Black Opalescent Double Rolled 3 mm Glass
Please note: As stated on the Bullseye website: Glass is hand rolled and cut sizes are approximate. If you need the exact size of 10" x 10" or 5" x 10" for a project, we suggest purchasing the next size up of glass. Please be aware that glass sizes may be slightly larger or smaller that the size you are ordering.
Stable. No color shift.
Compared to Black (000100), Stiff Black (000101) has a slightly higher viscosity, meaning that it is a stiffer glass. In most kilnforming applications, Black and Stiff Black can be used interchangeably. Kilnforming applications where differences between Black & Stiff Black might be noticed include working with elevated drop ring molds and kilncasting.
Stiff Black was originally developed for glass blowing purposes such as the Roll-up Technique. Using Stiff Black in kilnformed panels for this application creates a more uniform viscosity, which is easier to control.
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