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第九百八十八章 出土瓷器的做旧

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楚琛说道:“现在都快中午了,咱们吃过饭再去吧。”

“行。”二蛋点了点头。

“那我们先过去了,一会再联系……”

说完,楚琛把手机号码留给了二蛋,随后就告了辞。

从二蛋家出来,吴可就迫不及待的问道:“阿琛,你快说说,刚才那两件瓷器到底有什么问题啊?”

楚琛笑了笑:“其实吧,那两件瓷器确实还是挺有收藏价值的,但先他们断错了代,两件瓷器其实都是金代的器物……”

说着,他就把那两件瓷器的具体特征讲解了一下。

吴可笑眯眯的说道:“原来是这样啊,金代的东西当成是北宋的买,亏不死他。”

楚琛笑着点了点头:“除了断代错误之下,那两样东西其实还有一个问题,它们都经过做旧。”

“做旧?难道那两件瓷器都是赝品?”听楚琛这么说,吴可非常的惊讶。

“我刚才可是说过他们断错了代的。”楚琛笑道。

“嘿嘿,也是哦,但既然都是真的,那为什么还要做旧呢?”吴可对此显然有些想不明白。

于是,楚琛就把其中的原因,给吴可解释了一遍。

吴可了然道:“原来是这么回事,不过那两样东西我看着好像挺自然的啊,一点都不像是人为做旧的模样,手艺未免也太高了点吧。”

楚琛说道:“对方做旧的手艺确实很高,但这出土瓷器做旧,说容易也容易,说难也难,如果没有相应的工具,那就是巧妇难为无米之炊了……”

一般来说,出土瓷器的做旧,有两大步骤。

先,出土瓷器的圈足上一般有芒刺,不光滑,拉手,藏家们通常用纱纸、砂轮去打磨磨光,由于砂纸的材质均以金刚砂为主,打磨出来痕迹太明显,不自然不说,甚至不小心造成釉面划伤。

怎么办?国外的一些专家经过试验,就找到了合适的材料,这些打磨圈足的并不是难找的什么奇异材料,而是我们在收藏中常见的劣质玉石,玛瑙,以及雨花石之类的矿石。

想要打磨瓷器的圈足上的芒刺,就根据瓷器胎质的硬度,选择最佳的打磨材料。所谓最佳的打磨材料,通常指的是打磨材料的硬度要比瓷器胎质的硬度稍偏低的材料,在打磨的过程中,让胎质磨的玉石面上起白沫为佳,这样研磨出来的圈足,会呈现自然的一种磨损痕迹,看不出它是人为快打磨过。

听楚琛说到这里,吴可就举手打断道:“阿琛,如果石料的硬度比圈足胎质的硬度低,还能打磨的下去吗?”

楚琛笑着解释道:“我举个简单的例子,就好比岩质的抛光磨刀石,刀能砍入磨刀石,但磨刀石能把刀刃磨出来。其中的原理你应该知道吧,打磨芒刺用的就是同样的道理。”

吴可点了点头,表示明白。

磨刀石的表面不是平滑的,而是一个个坚韧点,通过软组织把它们连接到一起。之所以能够磨刀,其实就是利用磨刀石上密集的坚韧点来削掉韧口的钢,使其变薄。至于磨刀时用水浇一下,主要就是降温和冲刷掉铁屑和石浆。

楚琛接着说道:“具体在选择上,明清瓷器一般根据胎质的硬度,选择玉粉压铸的玉器来打磨,有些圈足刷了封胎釉的,要使用比玉粉件硬点的玛瑙来打磨,高古瓷器胎质比较软的最好选择岫玉来打磨,或印章石料来打磨……”

说到这里,大家就走到了胡勇家门口,此时,饭菜已经准备好了,胡勇的父母和哥嫂正在招呼帮忙的村民入坐,看到楚琛他们回来,连忙也邀请他们入了座。

酒过三巡,菜过五味,楚琛就接着说起刚才的事情。

修整、打磨了出土瓷器圈足上的芒刺,不过做旧的第一个步骤,想要让出土瓷器成为传世瓷器,还要让瓷器上拥有另外两个传世瓷器的重要特征。

第一,传世瓷器表面拥有的千丝万缕的摩擦痕迹,也就是牛毛纹,这是老器的一大重要特征。第二个特征,就是传世瓷器由于长期的氧化,与长年累月抹布的擦拭,瓷器表面形成的包浆了。

想要从出土瓷器变为传世瓷器,这两个特征肯定是不能少的,不然分分钟就会被专家识破。于是,在利益的驱使下,国外专家绞尽脑汁,就研究出了相应的解决办法。(未完待续!

ps:感谢“白胡子老鼠”投的月票!

...

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