银的识别

　　纯银又称纹银，目前现有的科学能够提炼的最高纯度为99.999%以上，纯银一般是作为国家金库的储备物，所以纯银的成色一般不应低于99.6%。而低于这个级别的，含量大于等于99%的白银，我们称作为足银。
　　xianzaiwomenlaizhongdianshuoyixiaseyin。yinyouchengputongshoushiyinhuociyin。zaichunyinhuozuyinzhongjiarushaoliangdeqitajinshu，yibanshijiaruwulihuaxuexingzhiyuyinxiangjindetongyuansu，jiukeyixingchengzhidibijiaojianyingdeseyin。seyinfuyourenxing，bingbaochilechunyindeyanzhanxing，tongshikeyijiandikongqiduiyindeyanghuazuoyong，yinci，seyinshoushidebiaomiansezejiaozhichunyinyuzuyingengbuyigaibian。zhongguoseyindechengseguidingyibaifenshubiaoshi，guowaiyibanguidingyiqianfenshubiaoshi，ruzhongguode“80yin”yuwaiguode“800s”（sweiyingwenyinsilverdesuoxie）doubiaoshiyindechengsewei80%。