推荐回答(3个)
鉴定瓷器土沁主要通过以下几个方面进行:
1、首先是听声音:新胎声音硬、脆,而老胎铝含量较高,具冷性,敲打时声音沉闷;
2、再看光泽:新瓷有高光点,光 亮刺眼,而老瓷光从内发,黝亮养眼;
3、最后可用弱酸洗胎:刻意做旧的新胎一洗就露出了本来面目,而老胎表层不能轻易洗掉。还有一种用胶搀和杂物的方法特殊做 旧,不容易洗,需综合分析再做判断。
土沁于老釉上的附着或渗透,既取决于釉质的结构,又取决于土壤的成分,大致可分为物理性附着和化学性渗构,从而表现出各种形态。土沁的各种形态我们就不多说了,玩家都观察过。土沁形成的难易依土壤的酸碱性和综合腐蚀性以及是否具备水介质的传递而决定。

扩展资料:
土沁之痕是器物入土受浸所致。土沁可分两大类:一是器表之沁,二是釉内釉下直入胎骨的沁。土沁之痕与自然界中的多色泽酸、碱、盐等土质相关。原则上宋以前一元配的器物较二元配的器物受沁严重。
当然也与存放环境的墓穴坍塌、完好等因素相关;也与器物本身的多元用料、制作和所存放的地质的铁等元素含量不同有关。而在我国特定地区的特殊树种根须沁于器表的也有。
我国幅员辽阔,土质结构多种多样,酸碱等沁以及现代工业的微沁也是存在的。出土器会出现其特殊的变化。因受沁而气泡破裂,以及二次开片等,因受沁程度不一,也会使釉表发生另类变化。因而,不能以某一种环境下的器物之沁作为通用标准来试行运用,而要客观公正的,具体情况具体对待。
土沁之痕是器物入土受浸所致。就器物的归类而言,土沁可分两大类:一是器表之沁,二是釉内釉下直入胎骨的沁。
土沁之痕与自然界中的多色泽酸、碱、盐等土质相关。原则上宋以前一元配的器物较二元配的器物受沁严重。当然也与存放环境的墓穴坍塌、完好等因素相关;也与器物本身的多元用料、制作和所存放的地质的铁等元素含量不同有关。原则上可直入胎骨的多为可溶于水的如盐碱等类似铁矿山区的这种氧化物则多沁于表面。而在我国特定地区的特殊树种根须沁于器表的也有。
从土沁观器物,可提供很多的便利。如黄土地的土沁痕,表面为干净的,沁点是反映在釉下的。而表面新、内部成点状的这种土沁斑器物,则不存在假的可能,当然前提是要懂得识别真实的沁斑。我国幅员辽阔,土质结构多种多样,酸碱等沁以及现代工业的微沁也是存在的。所以,目前的有些现代科技手段因数据难全,故也有误差。
因而,不能以某一种环境下的器物之沁作为通用标准来试行运用,而要客观公正的,具体情况具体对待。合理的运用全方位的知识,做出正确的断定,如此将会极少出错。出土器会出现其特殊的变化。因受沁而气泡破裂,以及二次开片等,因受沁程度不一,也会使釉表发生另类变化。如观食用碱遇湿放干后的变化,再去观出土于盐碱地的器物,用这些自然现象去联想古瓷,会受到相应的启发。
首先看他形成土沁的纹路 一般有开片的地方为沁色的入口 有待学习 加油
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