To consistently reach target color when firing gold-bearing striking glasses, Bullseye advises a pre-rapid heat soak of 2 hours at 1225°F (663°C) on the way up to process temperature. This applies to all forms of these glasses: sheet, billet, rod, frit, etc.
To learn more see this information page from Bullseye Glass
Bullseye Striking Glass
This is a Bullseye Color that Strikes. Bullseye produces some glasses that appear pale or even colorless in their cold form but “strike” or mature to a target color when fired to the right temperature. Stained glass and mosaic makers should beware of striking glasses. The unfired sheet colors for strikers vary widely and may not be suitable.
For Kilnformers/glass fusers some glasses appear pale or colorless and “strike” (i.e. change) to the target color only after reheating. Keep in mind that the resulting color may vary depending on variations in the temperature, atmosphere or amount of heatwork. For example, rapidly heating Ruby Red Tint Striker (BE 1824 30F) during the initial stages of a firing cycle can prevent the glass from correctly striking and give it a blue-brown cast (the sapphirine effect) as opposed to the Ruby Red color that develops with more conservative initial rates of heat.
For projects that are especially color-sensitive, we recommend fusing or torchworking a small sample of your glass before use, to best understand the final color result.
For more information, view this PDF information sheet provided by Bullseye Glass
Bullseye billets can be an excellent choice for casters who are concerned about the safety issues in working with lead crystal. Bullseye billets are also significantly lighter than lead crystal and may be more economical to use. In comparing costs, remember that full lead crystal glasses weigh as much as 45% more. The specific gravity of Bullseye glass is about 2.5.
Billet size: 5" x 10" x ¾"
Estimated Billet weight: 3.5 lbs.
Click here for TipSheet 5: Bullseye Box Casting
Click here for Annealing Chart for Thick Slabs from Bullseye
Bullseye Glass Company
Bullseye Glass Company is a manufacturer of colored glass for art and architecture with worldwide distribution and a strong commitment to research, education, and promoting glass art. Bullseye Glass was started in 1974 and is based in Portland, Oregon.
We stock Bullseye’s Double Rolled (30) sheets which have a flatter surface than single-rolled sheets and are ideal for fusing. Thin Rolled (50) are half the thickness of standard glass (1.6 mm) and exceptionally easy to cut.
Bullseye Glass is priced by the pound. Average weight of a double rolled (3 mm) sheet is 7.5 pounds (3.5kg) per sheet. Thick-rolled (6 mm or 1/4") is 16 pounds (7kg) per sheet. Thin Rolled are half the thickness and average weight is 2.5 pounds (1 KG) per sheet. Tekta is sold by the square foot.
Bullseye glass bears a 4-digit base code and a 2-digit suffix. In addition, some include a final letter code. The first four digits indicate the base glass; the second two digits indicate surface treatment, profile or thickness.
|4-Digit Base Code
0XXX Solid Opal
1XXX Solid Color Transparent
2XXX 2-Color Streaky
3XXX 3-Color Streaky
4XXX Collage Glass
6XXX Ring Mottle
F Fusible/Tested Compatible
2-Digit Suffix Code
22 Herringbone Ripple
24 Soft Ripple
25 Iridized Herringbone Ripple
30 Double Rolled (3mm)
31 Rainbow Iridized Double Rolled
33 Double Rolled, 40" long
|37 Silver Iridized Double Rolled
38 Gold Iridized Double Rolled
43 Reed texture (3 mm)
44 Iridized Reed
45 Accordion texture (3 mm)
46 Iridized Accordion
50 Thin Rolled (1.6 mm)
51 Rainbow Iridized Thin Rolled
53 Reed Thin Rolled
54 Iridized Reed Thin Rolled
55 Accordion Thin Rolled
56 Iridized Accordion Thin Rolled
57 Silver Iridized Thin Rolled
58 Gold Iridized Thin Rolled
60 Thick Rolled (6 mm)
80 Double Rolled (4 mm)
81 Iridized Double Rolled (4 mm)
Experimental Bullseye sheets are not run on a standard schedule from the manufacturer and therefore have a limited availability.
Bullseye also manufactures frit, powder, confetti, billets, rods, stix and stringer in three thicknesses - 1mm, 2mm and 0.5mm.