What type of glass is Bullseye?
soda-lime glass
It’s used in windows, tableware, containers, jewelry, and of course much more. The most common type of glass — and the type of glass Bullseye manufactures — is called “soda-lime glass”. Soda-lime refers to the composition of the glass, which is primarily silica, soda (sodium carbonate), and lime (calcium oxide).
Why do old glass windows have circles?
This is colloquially known as a ‘bulls eye’.. it is a pontil mark, just like on the bottom of blown glass ware. In mediaeval times the way window glass was made was similar to blowing. A blob of molten glass was picked up on a pontil, and spun rapidly to form a disk.
What is bullion glass?
Bullions, also known as Bull’s eyes, is glass with raised rings in the centre of the glass.
What county is Bullseye Glass?
Portland, Oregon
All our glass is handcrafted in Portland, Oregon, USA. Over our forty-plus year history, Bullseye Glass has collaborated with a community of artists worldwide with whom we have been instrumental in developing many of the fundamental materials and methods at the core of the contemporary kiln-glass movement.
What is the purpose of Bullseye glass?
Known as a bullseye, the thicker center area around the pontil mark was used for less expensive windows. To fill large window spaces with the best glass, many small diamond shapes were cut from the edge of the disk. These were mounted in a lead lattice work and fitted into the window frame.
How thick is Bullseye?
Consider the 6-millimeter rule: When heated to full fusing temperatures, most Bullseye sheets will naturally assume a thickness of about 6 millimeters unless constrained by dams or molds. For projects like plates and tiles, you may want to start with a base of two layers of Standard 3 mm sheet glass.
What is antique window glass called?
Cylinder Glass
Cylinder Glass and Crown Glass are two types of authentic, mouth-blown antique window glass typically found in historical structures in the United States. Both types employ a blowpipe to shape the molten glass.
What is crown glass made of?
Crown glass is produced from alkali-lime silicates containing approximately 10% potassium oxide and is one of the earliest low dispersion glasses. As well as the specific material named crown glass, there are other optical glasses with similar properties that are also called crown glasses.
Why is it called a bullseye?
Darts players might yell, “Bull’s eye!” when they hit that center ring. The term originated with 1880s shooting competitions in England, either from the idea that the black circle in the middle of the target looks like the eye of a bull, or possibly a five shilling coin that was popularly called a bull’s eye.
What’s another word for Bullseye?
What is another word for bullseye?
| middle | core |
|---|---|
| depth | eye |
| internals | kernel |
| pith | focus |
| marrow | focal point |
What is a flint glass?
In the optical glass industry, flint glass is any highly refractive lead-containing glass used to make lenses and prisms. Because it absorbs most ultraviolet light but comparatively little visible light, it is also used for telescope lenses.
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