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'''Glassblowing''' is the process of forming [[glass]] into useful shapes while the glass is in a molten, semi-liquid state. While the first evidence of man-made glass occurs in Mesopotamia in the Late-Third/Early-Second Millenium BCE, the actual "blowing" of glass using a tube did not occur until the First Century BCE. This advancement transformed the material's usefulness from a time-consuming process in which the medium was hot-formed around rough cores of mud and dung into a mass-producible material which could be quickly inflated into large, leakproof vessels.
'''Glassblowing''' is the process of forming [[glass]] into useful shapes while the glass is in a molten, liquified state.


Traditionally, the glass was melted in furnaces from the raw ingredients of [[sand]], [[limestone]], and pot ash. The glass blowing team would collect the glass on metal pipes to blow it and on rods to shape solid parts like handles. During this process the glass object normally never goes below about 1000°F.
Traditionally, the glass was melted in furnaces from the raw ingredients of [[sand]], [[limestone]], soda, pot ash and other compounds. The transformation of raw materials into glass takes place well above 2000°F; the glass is then left to "fine out" (allowing the bubbles to rise out of the mass), and then the working temerature is reduced in the furnace to around 2000°F. "Soda-lime" glass remains somewhat plastic and workable, however, as low as 1000°F.


Working, usually, on a much smaller scale, a traditional lampworker used alcohol lamps and breath or billows driven air to create a hot flame to work glass in the form of rods, the end of which was melted in the flame.
A lampworker, usually operating on a much smaller scale, historically used alcohol lamps and breath or bellows-driven air to create a hot flame at a workbench to manipulate preformed glass rods and tubes. These stock materials took form as laboratory glass, beads, and durable scientific "specimens" - miniature glass sculpture. Still practiced today, the lampworker uses a flame of oxygen and propane. The modern torch permits working both the soft glass from the furnace worker and the borosilicate (low-expansion) glass of the scientific glassblower who may have multiple headed torches and special [[lathe]]s to help form the glass or [[quartz]] used for special projects.

Modern lampworking is a method of glassblowing that involves using propane-oxygen torches instead of other traditional methods -- also called torch working, the modern torch permits working both the soft glass from the furnace worker and the borosilicate low expansion glass of the scientific glassblower who may have multiple headed torches and special [[lathe]]s to help form the glass or [[quartz]] used for special projects.

Revision as of 02:51, 17 October 2003

Glassblowing is the process of forming glass into useful shapes while the glass is in a molten, semi-liquid state. While the first evidence of man-made glass occurs in Mesopotamia in the Late-Third/Early-Second Millenium BCE, the actual "blowing" of glass using a tube did not occur until the First Century BCE. This advancement transformed the material's usefulness from a time-consuming process in which the medium was hot-formed around rough cores of mud and dung into a mass-producible material which could be quickly inflated into large, leakproof vessels.

Traditionally, the glass was melted in furnaces from the raw ingredients of sand, limestone, soda, pot ash and other compounds. The transformation of raw materials into glass takes place well above 2000°F; the glass is then left to "fine out" (allowing the bubbles to rise out of the mass), and then the working temerature is reduced in the furnace to around 2000°F. "Soda-lime" glass remains somewhat plastic and workable, however, as low as 1000°F.

A lampworker, usually operating on a much smaller scale, historically used alcohol lamps and breath or bellows-driven air to create a hot flame at a workbench to manipulate preformed glass rods and tubes. These stock materials took form as laboratory glass, beads, and durable scientific "specimens" - miniature glass sculpture. Still practiced today, the lampworker uses a flame of oxygen and propane. The modern torch permits working both the soft glass from the furnace worker and the borosilicate (low-expansion) glass of the scientific glassblower who may have multiple headed torches and special lathes to help form the glass or quartz used for special projects.