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Effetre Glass
Effetre glass (, Italian ''F3'', abbreviated form of ''fratelli tre'', "three brothers"), once known as Moretti glass, is a kind of glass used in lampworking. It is considered a medium-soft glass and is popular because of its wide range of colors and the ease with which it is molded and shaped when hot. Genuine Effetre glass is made in Italy by the Effetre Murano S.r.l, on the island of Murano. It has a working temperature of and a coefficient of expansion value of 104. Effetre is a variety of soda-lime glass Soda lime is a mixture of NaOH and CaO chemicals, used in granular form in closed breathing environments, such as general anaesthesia, submarines, rebreathers and recompression chambers, to remove carbon dioxide from breathing gases to prevent .... References External links Effetre home page Glass production {{glass-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lampworking
Lampworking is a type of glasswork in which a torch or lamp is used to melt the glass. Once in a molten state, the glass is formed by blowing and shaping with tools and hand movements. It is also known as flameworking or torchworking, as the modern practice no longer uses oil-fueled lamps. Although lack of a precise definition for lampworking makes it difficult to determine when this technique was first developed, the earliest verifiable lampworked glass is probably a collection of beads thought to date to the fifth century BC. Lampworking became widely practiced in Murano, Italy in the 14th century. As early as the 17th century, itinerant glassworkers demonstrated lampworking to the public. In the mid-19th century lampwork technique was extended to the production of paperweights, primarily in France, where it became a popular art form, still collected today. Lampworking differs from glassblowing in that glassblowing uses a furnace as the primary heat source, although torches are ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Murano
Murano is a series of islands linked by bridges in the Venetian Lagoon, northern Italy. It lies about north of Venice and measures about across with a population of just over 5,000 (2004 figures). It is famous for its glass making. It was once an independent ''comune'', but is now a ''frazione'' of the ''comune'' of Venice. History Murano was initially settled by the Veneto#Roman period, Romans and from the sixth century by people from Altinum and Oderzo. At first, the island prospered as a fishing port and through its production of salt. It was also a centre for trade through the port it controlled on Sant'Erasmo. From the eleventh century, it began to decline as islanders moved to Dorsoduro. It had a Grand Council (Murano), Grand Council, like that of Venice, but from the thirteenth century, Murano was ultimately governed by a ''podestà'' from Venice. Unlike the other islands in the Venetian Lagoon, Lagoon, Murano minted its own coins. Early in the second millenniu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Coefficient Of Expansion
Thermal expansion is the tendency of matter to change its shape, area, volume, and density in response to a change in temperature, usually not including phase transitions. Temperature is a monotonic function of the average molecular kinetic energy of a substance. When a substance is heated, molecules begin to vibrate and move more, usually creating more distance between themselves. Substances which contract with increasing temperature are unusual, and only occur within limited temperature ranges (see examples below). The relative expansion (also called strain) divided by the change in temperature is called the material's coefficient of linear thermal expansion and generally varies with temperature. As energy in particles increases, they start moving faster and faster weakening the intermolecular forces between them, therefore expanding the substance. Overview Predicting expansion If an equation of state is available, it can be used to predict the values of the thermal expan ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Soda-lime Glass
Soda lime is a mixture of NaOH and CaO chemicals, used in granular form in closed breathing environments, such as general anaesthesia, submarines, rebreathers and recompression chambers, to remove carbon dioxide from breathing gases to prevent CO2 retention and carbon dioxide poisoning. It is made by treating slaked lime with concentrated sodium hydroxide solution. Chemical components The main components of soda lime are * Calcium oxide, CaO (about 75%) * Water, H2O (about 20%) * Sodium hydroxide, NaOH (about 3%) * Potassium hydroxide, KOH (about 0.1%). Anaesthetic use During the administration of general anaesthesia, the gases expired by a patient, which contain carbon dioxide, are passed through an anaesthetic machine breathing circuit filled with soda lime granules. Medical-grade soda lime includes an indicating dye that changes color when the soda lime reaches its carbon dioxide absorbing capacity. To ensure that a soda lime canister (CO2 absorber) is functioning pr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
