A close up of a knife in a bowl of gold

$amalgam（amalgam）teeth、A general term for alloys of mercury and other metals.。広義でteeth、Refers to mixtures in general。水銀teeth他の金属との合金をつくりやすい性質があり、Many alloys are liquid at room temperature.。which is currently used、Powder made by adding copper and zinc to a silver and tin alloy、It is made with mercury.。歯質との接着性teethないが、It expands when it hardens, so it can't be used to tightly close the affected area.、The best thing about it is that it is easy and cheap.、Looks metallic（silver gray）stand out in、The disadvantage is that mercury may leach out.。銀スズ合金と水銀との反応teethアマルガメーションと呼ばれる。反応teeth銀スズ合金粉末内に水銀が拡散し、Through a process in which mercury reacts with the surface of the alloy, it crystallizes while leaving an unreacted part in the center.。 reaction formula（non-equilibrium） Ag 3 Sn + Hg ⟶ Ag 2 Hg + Sn x Hg + Ag 3 Sn {\displaystyle {\ce {Ag3Sn + Hg -> Ag2Hg + Sn_x Hg + Ag3Sn}}} � + Hg ⟶ � 1 + � 2 + �{\displaystyle {\ce {\gamma + Hg -> \gamma_1 + \gamma_2\ + \gamma}}}水銀teeth常温で液体状態にある金属である。When gold is brought close to mercury, it absorbs the gold so that it melts.、金amalgamになる。金amalgamから、Adjust the hardness by squeezing out excess mercury using deerskin or recycled paper.。The surface of the copper to be plated is polished and cleaned with plum vinegar.、When spread evenly and held over a fire, the color of the mercury disappears and the color changes to gold.。This is because mercury evaporates at approximately 350°C.。この状態でteeth鍍金表面にteeth細かい粒子凹凸が残っているので、Carefully equalize with something like a metal spatula、Finish by performing a process called spatula polishing.。古墳発掘の副葬品teeth既に錆に覆われた銅や青銅が多いが、表面に金amalgam粒子の残留やヘラ磨きの痕跡があり、It is believed that it was plated.。水銀teeth人体にとって有害であり、水銀を蒸気にして大気中に飛ばすことteeth危険である。現在でteeth水銀の回収装置のない状況でのこの作業teeth禁止されている。$