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第68章 有请(1 / 2)

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这回伍三思看向小徒弟毛珌琫。

毛珌琫虽然入门晚,但学识也学得不少,知道师父这是要考校自己了,看刚才师兄给银霜讲课,估摸着大概也是让自己给她长点知识,沉思了一下,把古钱隔着棉布放到银霜面前,见她学着自己的样子,并不直接用手碰触这枚古钱,而是手托着底隔布翻动用放大镜观看,心里满意,对师父看人的眼光有了一个认同。

就他师父那样挑的人,确实还真不是是个人就捡回来的。

“古钱鉴定有七法。一,看铜质。先秦时期的铸市主要是铜锡合金铸成的,铜质呈青红色,质地较硬挺;隋代的五铢钱因为锡的成份大,铜质泛白,称之为白钱;乾隆五年以后,铸钱加锡。叫做青钱。”

“二,观锈色。古钱无外乎两种:一为掘品,一为传世品。掘品在地下埋藏了许多年,其表面都长满了铜锈色。传世品也因空气中氧化作用,表面有一层包浆,呈黑色或铜色。古铜锈呈现出黄、橙红、鲜红、深棕等不同的颜色,俗称“枣皮红”、“栗子壳”等。”

“真锈很不容易擦掉。而伪造锈色则不然,伪锈多在钱币表面,称作“浮锈”或“粉状锈”,比较轻浮,容易脱落,往往经碱水一煮,做上的假锈便不堪一击。”

“绿锈的形成又有南北方的差别,北方干燥,雨水少,不易干,则锈色坚硬。南方多雨水且潮湿,铜锈多呈蓝绿相间二色。如果入土区域燥热,铜锈会呈红紫色,但这种锈色不会单独存在于钱体上,必伴有绿锈混杂在一起,称之为“红斑绿锈”。如现钱体通为红锈,应属假钱,它是造假者将伪品放入炉中烧红。”

“三,看铸市铭文。每一种钱币文字的字体各有特征,不同时代的铸币铭文,有不同的书写风格。根据这些特征可检验是否为同时代的钱币。这就关系到对各个朝代的文字了解了,就不在这里细说,改天练字的时候讲给你听。”

“四,听声音。古钱币由于质地的原因,年代越久远,火气尽脱,氧化越严重,掷于水泥地面其声音也越喑哑。大概来说,先秦时期的刀、布、圜钱均都是哑音。而明代以后的钱币,距今时间较近,还未受到深层的氧化,声音则是清脆、响亮。”

“五,铸造方法。华夏主代铸币的铸造,大概经过了子范(土、石,铜)、母范(砖、铜)、翻砂等几个展阶段。无论是真钱还是伪品的各种铸造方法,都会在钱币上留下相应的痕迹。”

“六,闻气味。因为伪品钱币多是用一些东西来伪造装饰,往往会散出一种难闻的、刺鼻的怪味,而真品钱币则没有这种怪味。”

“七,观版别。除了多看钱谱之外,必须要多接触实物,以熟悉各个朝代的钱币真品。不但要注意珍稀品,更要注意大量的普通品种。因为这些普通品很少伪品,能真实地反映各个历史时期的钱币特征。”

一气说完这么长一大段,毛珌琫捧起茶杯咕咕咕的把茶喝完,这才总结道:“师父要你拿个铜钱把玩着思考今天早上这些学识,其实也就是让你观版别练练手。”

“不错,”何洛跟着说道,“熟能生巧,以后等我们淘到好东西了,再多把玩,多对比,你就晓得了。”

银霜仔细的听着,不敢错过一个字,等大哥二哥讲完了,这才托起铜钱又仔细打量,伍三思从袋子里摸出一枚铜钱递过去,银霜知机的两只手各托着一枚掂量,明显的感觉大哥这枚钱要沉很多。

“大哥这个钱,铜锈有红有绿,应该是二哥刚才讲的‘红斑绿锈’,是干燥的土里出的。”她歪着脑袋用眼睛测量铜钱的平整度,满脸的犹豫与不确定:“可是这个钱又不平整,三叔,我能拿个称称下重不啰?”

伍三思就让何洛去拿了修复用的那种特别精确的小称下来,这古钱一称,竟有13克之重,就是连秦半两都越了过去。

银霜满头不解,何洛和毛珌琫是有猜测,但表现得没有把握,毕竟铜钱他两个接触得都很少很少。

作师父的一看就晓得他们几个在想么子,接过钱抛到何洛怀里,道:“扒撒你们晓得的吧。古董字画造假,有一种方式,就是后来的人用采用从古旧书画中拆取原装的绢、纸、轴头配袜在假画上,作真一副真古董字画,其实是在制作过程中,将真正的古物藏夹在这幅画中装裱起来,达到瞒过世人的目的。”

这下子何洛算是肯定自己的猜想没有出错了。他松了口气道:“师父,这个钱过重,应该也是这种夹藏手法了。”

“应该是。外头这个钱,从铜锈能看得出年代是比较长久的出坑货,而不是市面上被人摸来传去的传世品,而它明显又过重,也明显比传世钱要壮一圈,为师只能作以上猜测。这个钱,怕是掩人耳目用,真正的到代的极品古钱,怕就是藏在它肚子里头。”

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