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Stiff Black Opalescent - Bullseye (COE 90)

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SKU: BE0101-F
$1.50 / Ounce
1 – 15$1.50
16 +$1.30
$20.80 PER POUND
$34.72 per pound 
Save $13.92 (40%) per pound


Approximate Diameter: 4-6mm

Approximate Length: 14"-16"

COE: 90 Compatible

Cold Characteristics

True black, looks identical to Black Opalescent.

Working Notes

Torch: Holds a crisp edge in the flame longer & hotter than Black Opalescent.

Kiln: Stable. No color shift. Compared to Black Opalescent, Stiff Black 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.

Rods are pulled from re-melted Bullseye Compatible sheet glass. Rod is sold in lengths of approximately 18in. (450 mm) and 4-6mm in diameter. Bullseye rods are graded either as F (recommended for both kilnwork and torchwork) or T (recommended for torchwork only).

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