Mercury silvering methods. The technique was also used in Asia, for example "tokin" plating in Edo-period Japan. Mercury silvering Mercury silvering or fire gilding is a silvering technique for applying a thin layer of precious metal such as silver or gold (mercury gilding) to a base metal object. The process was invented during the Middle Ages and is documented in Vannoccio Biringuccio's 1540 book "De la pirotechnia". An amalgam of mercury and the precious metal is prepared and applied to the object which is then heated, sometimes in oil, vaporizing most of the mercury. The technique is dangerous since mercury is highly
Combination reaction fluorine gas will combine in a highly exothermic reaction to form the salt barium fluoride: Another example is magnesium oxide combining with carbon dioxide to produce magnesium carbonate. Another example is iron combining with sulphur to produce iron(II) sulfide. When a combination reaction occurs between a metal and a non-metal the product is an ionic solid. An example could be lithium reacting with sulphur to give lithium sulphide. When magnesium burns in air, the atoms of the metal combine with the gas oxygen to produce magnesium oxide. This specific combination reaction produces the bright flame generated by flares. Combination reactions