Post by Tobacco Town.
Casing & Flavoring of Tobacco
Casing & Flavoring |
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Types of Tobacco
Types of Tobacco |
Few pipe tobaccos marketed today consist of a single kind of tobacco. In almost every case, pipe tobacco is a blend of several varieties. Tobaccos generally fall into six basic categories with their own distinct qualities and characteristics.
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Borosilicate Glass
Borosilicate glass is a type of glass with the main glass-forming constituents silica and boron oxide. Borosilicate glasses are known for having very low coefficients of thermal expansion (~3 × 10−6 /°C at 20°C), making them resistant to thermal shock, more so than any other common glass. Such glass is less subject to thermal stress and is commonly used for the construction of reagent bottles. Borosilicate glass is sold under such trade names as Simax, Pyrex, Endural, Schott, or Refmex.
The European manufacturer of Pyrex, Arc International, uses borosilicate glass in its Pyrex glass kitchen products;[2] however, the U.S. manufacturer of Pyrex kitchenware uses tempered soda-lime glass.[3] Thus Pyrex can refer to either soda-lime glass or borosilicate glass when discussing kitchen glassware, while Pyrex, Bomex, Duran, TGI and Simax all refer to borosilicate glass when discussing laboratory glassware.
Most borosilicate glass is colorless. Colored borosilicate, for the studio glass trade, was first widely brought onto the market in 1986 when Paul Trautman founded Northstar Glassworks.[citation needed] In 2000, former Northstar Glassworks employee Henry Grimmett started Glass Alchemy and developed the first cadmium Crayon Colors and aventurine Sparkle colors in the borosilicate palette.
In addition to the quartz, sodium carbonate, and aluminum oxide traditionally used in glassmaking, boron is used in the manufacture of borosilicate glass. The composition of low expansion borosilicate glass such as those laboratory glasses mentioned above is approximately 80% silica, 13% boric oxide, 4% sodium oxide, and 2-3% aluminum oxide. Though more difficult to make than traditional glass due to the high melting temperature required (Corning conducted a major revamp of their operations to make it), it is economical to produce. Its superior durability, chemical and heat resistance finds excellent use in chemical laboratory equipment, cookware, lighting and, in certain cases, windows.
History
Brosilicate glass was first developed by German glassmaker Otto Schott in the late 19th century[1] and sold under the brand name "Duran" in 1893. After Corning Glass Works introduced Pyrex in 1915, the name became a synonym for borosilicate glass in the English-speaking world.The European manufacturer of Pyrex, Arc International, uses borosilicate glass in its Pyrex glass kitchen products;[2] however, the U.S. manufacturer of Pyrex kitchenware uses tempered soda-lime glass.[3] Thus Pyrex can refer to either soda-lime glass or borosilicate glass when discussing kitchen glassware, while Pyrex, Bomex, Duran, TGI and Simax all refer to borosilicate glass when discussing laboratory glassware.
Most borosilicate glass is colorless. Colored borosilicate, for the studio glass trade, was first widely brought onto the market in 1986 when Paul Trautman founded Northstar Glassworks.[citation needed] In 2000, former Northstar Glassworks employee Henry Grimmett started Glass Alchemy and developed the first cadmium Crayon Colors and aventurine Sparkle colors in the borosilicate palette.
In addition to the quartz, sodium carbonate, and aluminum oxide traditionally used in glassmaking, boron is used in the manufacture of borosilicate glass. The composition of low expansion borosilicate glass such as those laboratory glasses mentioned above is approximately 80% silica, 13% boric oxide, 4% sodium oxide, and 2-3% aluminum oxide. Though more difficult to make than traditional glass due to the high melting temperature required (Corning conducted a major revamp of their operations to make it), it is economical to produce. Its superior durability, chemical and heat resistance finds excellent use in chemical laboratory equipment, cookware, lighting and, in certain cases, windows.
The History of Tobacco in the United States
In 1609, John Rolfe arrived at Jamestown, Virginia, and is credited as the first settler to have successfully raised tobacco (commonly referred to at that time as "brown gold")[14] for commercial use. The tobacco raised in Virginia at that time, Nicotiana rustica, did not suit European tastes, but Rolfe raised a more popular variety, Nicotiana tabacum, from seeds brought with him from Bermuda. Tobacco was used as currency by the Virginia settlers for years, and Rolfe was able to make his fortune in farming it for export at Varina Farms Plantation. When he left for England with his wife, Pocahontas a daughter of Chief Powhatan, he had become wealthy. Returning to Jamestown, following Pocahontas' death in England, Rolfe continued in his efforts to improve the quality of commercial tobacco, and, by 1620, 40,000 pounds (18,000 kg) of tobacco were shipped to England. By the time John Rolfe died in 1622, Jamestown was thriving as a producer of tobacco, and its population had topped 4,000. Tobacco led to the importation of the colony's first black slaves in 1619. In the year 1616, 2,500 pounds (1,100 kg) of tobacco were produced in Jamestown, Virginia, quickly rising up to 119,000 pounds (54,000 kg) in 1620.
Throughout the 17th and 18th centuries, tobacco continued to be the cash crop of the Virginia Colony, as well as The Carolinas. Large tobacco warehouses filled the areas near the wharves of new, thriving towns such as Dumfries on the Potomac, Richmond and Manchester at the fall line (head of navigation) on the James, and Petersburg on the Appomattox.
Until 1883, tobacco excise tax accounted for one third of internal revenue collected by the United States government. Internal Revenue Service data for 1879-80 show total tobacco tax receipts of $38.9 million, out of total receipts of $116.8 million. 'The Republican Campaign Textbook, 1880.' Statistical Tables, P 207.
A historian of the American South in the late 1860s reported on typical usage in the region where it was grown:[15]
Throughout the 17th and 18th centuries, tobacco continued to be the cash crop of the Virginia Colony, as well as The Carolinas. Large tobacco warehouses filled the areas near the wharves of new, thriving towns such as Dumfries on the Potomac, Richmond and Manchester at the fall line (head of navigation) on the James, and Petersburg on the Appomattox.
Until 1883, tobacco excise tax accounted for one third of internal revenue collected by the United States government. Internal Revenue Service data for 1879-80 show total tobacco tax receipts of $38.9 million, out of total receipts of $116.8 million. 'The Republican Campaign Textbook, 1880.' Statistical Tables, P 207.
A historian of the American South in the late 1860s reported on typical usage in the region where it was grown:[15]
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