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Older clear-glass Pyrex manufactured by Corning, Arc International's Pyrex products, and Pyrex laboratory glassware are made of borosilicate glass. According to the National Institute of Standards and Technology , borosilicate Pyrex is composed of (as percentage of weight): 4.0% boron , 54.0% oxygen , 2.8% sodium , 1.1% aluminum , 37.7% silicon ...
Cut glass wine glass made of lead glass. Lead glass, commonly called crystal, is a variety of glass in which lead replaces the calcium content of a typical potash glass. [1] Lead glass contains typically 18–40% (by mass) lead(II) oxide (PbO), while modern lead crystal, historically also known as flint glass due to the original silica source, contains a minimum of 24% PbO. [2]
Heat resistant (ex: Pyrex dishes) and lead glass (ex: crystal with lead content) Manpower or machinery can be used in different stages of purification. Since they melt at higher temperatures than glass, separation of inorganics, the removal of heat resistant glass and lead glass is critical.
Read more The post 10 Vintage Pyrex Bowls Worth Serious Cas Featuring quirky and vibrant patterns, vintage Pyrex is experiencing a resurgence in popularity, especially among collectors who cherish ...
If you want a Pyrex bowl solely for its functionality, hit your local thrift store. "You can almost always find a piece in the kitchen section, and you can expect to pay under $10 for it, and it ...
2. Baby Food. One might think that a product advertised for infants and young children would be safe to eat. Alas, it's shocking how much food marketed to kids contains lead.
The lids of CorningWare are typically made of Pyrex. Though some early lids were made of Pyroceram, most subsequent covers have been made of borosilicate or tempered soda-lime glass. Unlike the cookware, these lids have a lower tolerance for thermal shock and cannot be used under direct heat.
Not just any oven-safe glass dish, but a Pyrex -- a name synonymous with baking. One of the few brands to reach iconic status in the American kitchen, Pyrex has Pyrex: Fire and Pride Are Glassware ...