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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]
Luxottica. Luxottica Group S.p.A. is an Italian eyewear multinational corporation headquartered in Milan. As a vertically integrated company, Luxottica designs, manufactures, distributes, and retails its eyewear brands through its own subsidiaries. It is the largest eyewear company in the world. [5][6] It is, since October 2018, a subsidiary of ...
By 1910, "twenty glass containers were produced for every person in the United States". [1] The solution to this problem was the introduction of bottle deposits (usually 2 cents), which had first been introduced by beer and soda distributors during the 1870s and 1880s and became more common in the soda industry by the 1920s. [ 2 ]
Soda lime glass from virgin raw materials theoretically requires approximately 2.671 GJ/tonne compared to 1.886 GJ/tonne to melt 100% glass cullet. [6] As a general rule, every 10% increase in cullet usage results in an energy savings of 2–3% in the melting process, with a theoretical maximum potential of 30% energy saving. [6]
According to this source, 1 November 2011 to 30 September 2012 will be a transitional period and as of 1 October 2012, imports and sales of ordinary incandescent bulbs of 100 watts or more will be prohibited. The first phase will be followed by a ban on 60-watt-and-higher incandescent light bulbs starting in October 2014.
Coupon collector's problem. In probability theory, the coupon collector's problem refers to mathematical analysis of "collect all coupons and win" contests. It asks the following question: if each box of a given product (e.g., breakfast cereals) contains a coupon, and there are n different types of coupons, what is the probability that more ...