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Slumping glass is a highly technical operation that is subject to many variations, both controlled and uncontrolled. When an item is being slumped in a kiln, the mold over which it is being formed (which can be made of either ceramic, sand or metal) must be coated with a release agent that will stop the molten glass from sticking to the mold.
Glass casting is the process in which glass objects are cast by directing molten glass into a mould where it solidifies. The technique has been used since the 15th century BCE in both Ancient Egypt and Mesopotamia. Modern cast glass is formed by a variety of processes such as kiln casting or casting into sand, graphite or metal moulds.
Warm glass or kiln-formed glass is the working of glass, usually for artistic purposes, by heating it in a kiln. The processes used depend on the temperature reached and range from fusing and slumping to casting. "Warm glass" is in contrast to the many cold-working glass processes, such as leaded glass.
Fused and kiln-formed glass sculpture. Glass fusing is the joining together of pieces of glass at high temperature, usually in a kiln. [1] [2] This is usually done roughly between 700 °C (1,292 °F) and 820 °C (1,510 °F), [3] [4] and can range from tack fusing at lower temperatures, in which separate pieces of glass stick together but still retain their individual shapes, [5] to full fusing ...
O-I Glass, Inc. is an American company that specializes in container glass products. [2] It is one of the world's leading manufacturers of packaging products, holding the position of largest manufacturer of glass containers in North America , South America , Asia-Pacific and Europe (after acquiring BSN Glasspack in 2004 [ 3 ] ).
Causes of devitrification, commonly referred to as "devit", can include holding a high temperature for too long, which causes the nucleation of crystals. The presence of foreign residue such as dust on the surface of the glass or inside the kiln prior to firing can provide nucleation points where crystals can propagate easily.
He built some "glass–ovens" at Elizabeth Furnace in 1762, and began making glass in 1763. [45] Products were bottles and window glass. [46] He hired European glassblowers, including some from Venice, and paid for their transportation to Pennsylvania. [47] One of his first hires was a glassblower who had worked at the Wistar works. [40]
Kiln-formed glass sculpture "United Earth" by Tomasz Urbanowicz. Several of the most common techniques for producing glass art include: blowing, kiln-casting, fusing, slumping, pâté-de-verre, flame-working, hot-sculpting and cold-working. Cold work includes traditional stained glass work as well as other methods of shaping glass at room ...
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