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第七百九十五章 龟纹断

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看到吴可脸上惊疑的模样,楚琛就笑道:“怎么样,想起来了吧?”

吴可之前虽然学习古琴不认真,但古琴的构造和工艺还是知道的,她有些惊讶的说道:“阿琛,难道你的意思是说,下面的这一层,是纯鹿角灰胎,这真得是一把唐代的古琴?”

琴的制作过程是非常考究的,其它先不说,为了对琴更好的保护,上漆是必不可少的一步。

由于生漆具有弹性,有永不磨损的特性,硬度高、附着力强,传音效果好,即便是现代科技如此达,目前还没有任何合成漆能取代它的功能。因此,不管是古代还是现代,琴表漆都是用的生漆。

生漆,是我国著名的特产,从漆树上采割而得的漆液,经除去水份并滤去杂质即为生漆。

生漆品质的优劣,是与产地、漆树品种、立地条件、割漆时间等有着密切的联系。《本草刚目》记载:“凡验漆,惟稀者以物醮起,细物不断,断而急收,更又涂于竿竹上,荫之干者,并佳。”

生漆的干燥,必须荫室,如果处理不恰当,容易造成返工浪费。同样的漆,在南方髹涂比北方易干,春秋季节比夏冬季节易干,新漆比陈漆易干,稠漆比稀漆易干。

天然漆漆膜坚硬而富有光泽,具有良好的耐腐性,耐热、耐水、耐油和耐多种有机溶剂的功能,电绝缘性能也很好。今天我们有幸落指抚触上千年的老琴,上好生漆的功劳,绝不可抹杀。

另外,琴面木质松软,为保护琴面能历经长期的磨损,又要兼具传音效果,除了上好的生漆之外,琴器表漆下必有灰胎,因此加上漆灰的工作成为制琴最重要的一环。

用在琴上的漆灰有鹿角灰、瓷灰、砖灰等八种漆灰,其中最常见为鹿角灰、瓦灰以及八宝灰,又以生漆与鹿角灰的组合,为历来斲琴家所公认为最佳涂料。

鹿角灰是以鹿角霜粉末调和生漆,之所以说纯鹿角灰就是使用的百分之百的鹿角霜。

现在许多卖古琴的,都说自己一把几千块钱的古琴使用的是纯鹿角灰,楚琛想想都觉得很可笑。

要知道,梅花鹿可是国家保护动物,就算有饲养的,数量也少的可怜,想想一把古琴长度可是有一米多,宽度在二十公分左右,这么大的面积,使用纯鹿角灰,几千块钱买的下来吗?还是说,商人们都是活雷锋,喜欢做赔本的买卖?

言归正传,吴可之所以觉得这把琴是唐代的古琴,也是因为经过长时间沉淀,唐代古琴的表面漆灰正好就有墨、栗壳色两种,这把琴正好是栗壳色的,吴可当然会如此怀疑。

楚琛回道:“是不是唐代的琴,得把上面这层掩饰的漆去掉,看看下面的断纹才行!”

吴可闻言连连点头,表示同意。

断纹指琴表面上因长年风化和弹奏时的震动所形成的各种断痕。断纹的种类很多,主要有梅花断、牛毛断、蛇腹断、冰纹断、流水断、龙鳞断等。

像唐琴的断纹以蛇腹断为多,也有冰纹断、流水断等。如果一会去掉上面的漆,看到许多蛇腹断,那么这把琴是唐琴的可能性很大。

说干就干,楚琛先是用手在掉漆的部位把上面的掩饰漆撕了一下,现这层漆已经风化的非常厉害,很容易就能去掉,于是两人马上动手,小心又快的把上面这层漆给去除了。

随着时间的流逝,琴面的掩饰漆越来越少,吴可就看到琴面上有着许多形如冰面开裂、横竖交织之纹路,等到完工后,她就有些失望的问道:“阿琛,这是冰纹断吗?”

冰纹断是明后期才被传说开来的断纹品种,古人皆未提及。传世古琴中,冰纹断在元明琴上相当常见。因此,吴可才显得有些失望。

楚琛笑着说道:“冰纹断可比这个要小,这是龟纹断。”

吴可脸色一变,惊呼道:“这是龟纹断?!”

古琴以龟纹断最为名贵,琴家常有“千年难买龟纹断”之说,其代表的年代也非常的古老。其次则为梅花纹,然后是牛毛断、蛇腹断(又分为大小蛇腹断)和流水断(又分为大小流水断)等。

不过龟纹断虽然最为名贵,一般人也只闻其名不见其身,现在乍然见到这种纹断,吴可心中的惊讶可想而知。

吴可定了定心神,开口问道:“阿琛,难道这把古琴,还早于唐代?”

楚琛摇了摇头道:“一般来说,琴不过百年不出断纹,而随年代久远程度不同,断纹也不尽相同,是鉴藏古琴的主要依据之一。但这其实是一种误解,从历史传世实物来看民国制作的古琴也有断纹。有的传统工艺制作古琴更是在制作未完成时就已出现断纹……”(未完待续。。)

ps:感谢“健壮小星星”“书友13o93ooo1413o67”“夏陌1314”投的月票

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