[DOC] [TLE] George Ravenscroft - Wikipedia [PAR] George Ravenscroft (1632  7 June 1683) was an English businessman in the 
import/export .... The use of lead in glass was known in Italy as proved by 12% 
lead being ... Early Ravenscroft glass (16741676) typically suffered from 
crizzling ... his patent some 100 glass makers in England were producing lead 
crystal glass. [DOC] [TLE] Lead glass - Wikipedia [PAR] Lead glass is desirable owing to its decorative properties. Originally discovered 
by Englishman George Ravenscroft in 1674, the technique of adding lead oxide... [DOC] [TLE] George Ravenscroft | English glassmaker | Britannica.com [PAR] In 1674 Ravenscroft obtained a seven-year patent for a glass with the ... By the 
17th century England was making glass in the Venetian tradition that was ... 
addition of lead oxide to Venetian-type glass produced a solid, heavier glass. .... 
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of Use. [DOC] [TLE] English for Glass Professionals | Lesson 1: Glass History | Modern ... [PAR] England: Lead crystal ... glassmaker George Ravenscroft (1618-1681), who 
patented his new glass in 1674. ... By using higher proportions of lead oxide 
instead of potash, he succeeded in producing a ... In 1688, in France, a new 
process was developed for the production of plate glass, principally for use in 
mirrors, whose... [DOC] [TLE] Late 17th-Century Crystal Glass: An Analytical Investigation ... [PAR] By David Dungworth in Ancient Glass and Lead Glass. ... George Ravenscroft 
and His Patent In 1674, George Ravenscroft was granted ... R. J. Charleston, 
English Glass and the Glass Used in Eng- land, circa 4001940, London: George 
Allen ... Old English Glasses: An Ac- count of Glass Drinking Vessels in England, 
from... [DOC] [TLE] Types of Glass [PAR] The chemicals used in the makeup of this glass include Aluminium Oxide, ... this 
glass cleans dust particles and smudges on the glass using natural elements like 
UV rays and Rain. ... Once in England by 1674 a glass worker by the name of 
George Ravenscroft patented the invention of a lead crystal used in the making. [DOC] [TLE] Glass a Magic Material - Pt 3 Restoration & Ravenscroft | The ... [PAR] Aug 17, 2013 ... George Ravenscroft made the first English 'glass of lead' now ... glass industry in 
England, following the Restoration of King Charles II to the throne ... George 
Ravenscroft obtained a seven-year patent from Charles II in 1674 to produce 
glass ... which the new heavy glass wine bottles were largely replacing. [DOC] [TLE] Crystal - Kaufmann Mercantile [PAR] In 1674, George Ravenscroft  who had close ties to Venice  set out to 
capitalize on the growing demand for lead glass, and obtained a patent to be its 
sole manufacturer in England. ... The introduction of lead-oxide turns plain glass 
into crystal. ... Weight: Due to its lead content, crystal is naturally heavier than 
glass. Crystal... [DOC] [TLE] The Brand Equity- A Case Study of Saint-Gobain Glass India Ltd [PAR] Brand equity is a phrase used in the marketing industry which describes the .... 
1676 English glassmaker George Ravenscroft patented a formula for lead glass, 
heavy, clear ... of polished plate glass were established at Ravenshead in 
England ... invented lead glass in 1674 which was a major breakthrough in the 
history of... [DOC] [TLE] What is Glass? - Glass Recruiters [PAR] They may think of the glass in windows and the glass used in eyeglasses as 
being the .... Heat-resistant glass is high in silica and usually contains boric oxide
. .... Soda-lead glass has such beautiful optical properties that it is widely used for 
..... In 1674, an English glassmaker named George Ravenscroft patented a new 
type... [DOC] [TLE] thesis - Glass Art Society [PAR] and light in glass sculpture, artists need to be in control of colour hue and value. 
..... 11. Figure 47: Oxides used in the course of this project. .... Each element is 6 
cm3. Oxide ...... heavy lead glass for gems were melted in quantities of a few

Question: In 1674 England's George Ravenscroft patented glass that used an oxide of this heavy element, Pb
Answer: lead