What makes tempered glass tempered? In particular cookware.?
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to temper something means that you are heat treating it... it is not possible to "temper" something by adding another ingredient.  (temper means heat)\n\n Annealed glass which has been heated to a temperature near its softening point and forced to cool rapidly under carefully controlled conditions is described as "heat-treated glass." The heat treating process produces highly desirable conditions of induced stress (described below) which result in additional strength, resistance to thermal stress, and impact resistance.
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carbon fiber.\nit comes as a soft material rolled up like cloth, then they cut it and put it around a mould. It is hardened by putting it under a vacuum, and then in a huge autoclave which cooks the material. the result is strong yet light carbon-fiber
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Isn't that good enough, plate made of stainless-steel or glass kept in frigo?
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electricity, perhaps software, some sort of hardware (CD for CD players, cassettes for VHS), instructions (oven need type and heat info to function)
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The tempered safety glass in windshields is designed to break up into small pieces with fewer sharp edges.  Try picking some of it up -- do you see any long shards that could manage to puncture the thick rubber of your tire treads?  Any that could cut you deeply?\n\nThat's why he wasn't too concerned about it.
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Many plastics materials are microwave transparent, but some grades of Polypropylene have been refined specifically for use in microwave cooking applications.\n\nBP is a major supplier, I suggest you look there?
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The process of depositing a thin film of metal on glass is centuries old.  Aluminum is now used as well as silver.  It is a little different for telescope mirrors than for mirrors used in dressing rooms and bathrooms, but basicaly:\n\n“Virtually all mirrors for interior use are manufactured by the conveyor, wet deposition method. Annealed or fully tempered glass is thoroughly cleaned by the application of cleaners and passing contact with oscillating scrub brush units. After the glass is cleaned and rinsed, the surface of the glass is sensitized with a diluted solution of tin chloride. This surface treatment allows for the deposition of silver. Silver nitrate is sprayed onto the sensitized surface of the glass along with other chemical configurations. The final outcome is the formation of a uniform silver layer on the glass.”\n\nSee the site below for additional details on the mirroring process.
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do a search on paper companies in your area. many businesses are supplied by them, you may be able to order directly or if you seen a container at your deli for instance, you can order from them. this is a sample of what i'm talking about. if you are talking about glass, then you need a different search.
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Glass consists of a mixture of silicates, barates or phosphates that cools to a rigid condition without crystallization. (It can be made of quartz-sand, lime, soda, potash and lead oxide.) Crystal falls into the 3 main categories. Fine Crystal or Crystalline is made from a glass mixture that contains 6% - 10% lead oxide. Lead Crystal is made from a glass mixture that contains 10% - 24% lead oxide and Full Lead Crystal is made from a glass mixture that contains 24% lead oxide or more. For the most part, crystal by European standards regards 24% lead bearing glass as crystal. However, by American standards, any glass that is perfectly clear is considered crystal regardless of the lead content. Lead oxide in crystal gives the product clarity and sparkle. Any crystal that is hand-cut usually must be 24% lead oxide or over - otherwise the crystal would be too brittle and would break when cut or engraved.
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Assuming they're already nice and clean, a layer of shortening/spray-on vegetable oil usually does the trick for Cast Iron dutch ovens... I would imagine that it would do the same for a grill.
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Porcelain is a hard ceramic material. It is fired at a higher temperature than that used to fire glazed earthenware and stoneware pottery. It is white or off-white in colour, translucent and can be decorated to provide additional colour. Porcelain is made by firing a mixture of materials including China clay and China stone in a kiln at temperatures in the region of 1200 to 1350 degrees Celsius. The resulting material is hard, strong, glassy and durable, but also brittle. The main components of porcelain, China clay (kaolinite) and crushed China stone (a form of feldspar) are found in nature and result from the weathering and decomposition of igneous rocks such as granite and basalt.\n\nClays used for the manufacture of porcelain can be specially formulated to provide high-strength and high-durability. It is also possible to blend clays to obtain a clay body that is ideal for throwing on a potter's wheel. A wide range of porcelain clays is readily available from many specialist suppliers of materials for ceramics.
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Cauldrons, spits, tongs, forks, knives, cleavers, brick or clay ovens.\n\nSee the amazon link for books on medieval cookery!
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All i know is that stoneware is better than earth ware. it's more durable. in colonial times, they used salt in their glaze to give it special effects
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I am a ceramist.  Porcelain clay is hardened and made permanent by firing in a kiln at temperatures of between about 1200 degrees Celsius and about 1400 degrees Celsius. The toughness, strength and translucence of porcelain arises mainly from the formation at high temperatures within the clay body of the mineral mullite and GLASS.  \n\nThe side and rear car windows are made of tempered glass.  The glass is heated (at lower temperatures than required to make porcelain), then rapidly cooled. This "tempering" process makes the glass many times stronger than un-tempered glass of the same thickness.  Upon impact, tempered glass is designed to disintegrate into small pieces of glass about the size of rock salt. \n\nSince porcelain is heated at a higher temperature than auto glass, the harder porcelain will easily break auto glass.
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Fiberglass or fibreglass is material made from extremely fine fibers of glass. It is widely used in the manufacture of insulation and textiles. It is also used as a reinforcing agent for many plastic products; the resulting composite material, properly known as glass-reinforced plastic (GRP) or glass-fiber reinforced epoxy (GRE), is called "fiberglass" in popular usage.
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Are you sure it doesn't say "pres cut". If it does, that would be a brand of cut depression glass. I'm sure yahoo groups has a pottery/glass forum.
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www.o-i.com/about/corporate/glassmfg.asp\n\nwww.glassonweb.com/glassmanual/topics/index/production.htm