Does man-made crystal cup contain lead?
Man-made crystal goods contains many lead. The crystal goods branch that sells on market is natural with man-made two kinds. Hundred thousands of years ago, earthly magma from the earth's core to upper activity, the magma that contains 2 oxidation silicon among them digs person dirt, the cavity in rock, crystallize slowly make the natural crystal now. Natural crystal is a kind of transparent quartz crystallizes, composition is 2 oxidation silicon.
In those days the Englishman heats with charcoal, make Sha Rong changes the glass that make, smoke as kind of sweet grass make vitreous hair yellow, add lead inadvertently later, discover " glass " more transparent more shining, say for " lead glass " , the man-made that this is later is crystal. Man-made crystal mixed quartz arenaceous reach oxidation lead to wait a variety of mineral, be made via careful cut technology and burnish kongfu and become, and complete lead crystal is man-made crystal in the most delicate a kind, contain lead to exceed 24 ％ . Composition of high oxidation lead enhanced its natural color. Lead under 24 ％ person call plumbic crystal. Fill wine with crystal container, after a hour, the quantity containing lead in wine is one times more elevatory. Another experiment makes clear: crystal of park of a litre of brandy in household utensils, after 5 years, the quantity containing lead in wine can be as high as ／ of 20 thousand milligram to rise, exceed environmental protection branch to measure the provision that should raise under 50 milligram ／ about lead is being contained in drink far. Because crystal goods do manual work is careful, outside and glittering and translucent get rid of is appeared, reason has " beautiful drugs " say. If use the glass that the man-made crystal that contains lead makes to fill,put the acidity beverage such as fruit juice, the plumbic salt that lead may form solubility is photographed by human body along with beverage person.