推荐回答(4个)
汝瓷是我国宋代“汝、钧、官、哥、定”五大名瓷之一,因产于汝州而得名,在中国陶瓷史上素有“汝窑为魁”之称。汝瓷的基本鉴别方法,从传世品看,主要有五大特征。
胎色
汝瓷胎质细腻,胎土中含有微量铜,迎光照看,微见红色,胎色灰中略带着黄色,俗称“香灰胎”,多见汝州蟒川严和店、大峪东沟,汝州文庙、清凉寺等窑址;汝州张公巷汝窑器,胎呈灰白色,比其他窑口的胎色稍白,是北宋官窑的主要特征。
釉色

汝瓷为宫廷垄断,制器不计成本,以玛瑙入釉,釉色呈天青、粉青、天蓝色较多,也有豆绿、青绿、月白、桔皮纹等釉色,釉面滋润柔和,纯净如玉,有明显酥油感觉,釉稍透亮,多呈乳浊或结晶状。用放大镜观察,可见到釉下寥若晨星的稀疏气泡,釉面抚之如绢,温润古朴,光亮莹润,釉如堆脂,素静典雅、色泽滋润纯正、纹片晶莹多变为主要特征。视之如碧峰翠色,有似玉非玉之美。釉中多布红晕,有的如晨日出海,有的似夕阳晚霞,有的似雨过天晴,有的如长虹悬空,世称“天青为贵,粉青为尚,天蓝弥足珍贵。”汝州张公巷汝瓷,釉呈天青、粉青,釉色滋润,手感如玉。有青如天 、面如玉、晨星稀的典型特征。

汝窑器有瓶、尊、盏托、碗、盘、洗、奁、水仙盆等日用器,少数还有堆花、印花等装饰,底部更有青花年号款,多是用刀笔刻画,和印花、模印等工艺。如:天青花草纹鹅颈瓶、粉青履莲盏托、天青莲花瓣深腹盂、天青牡丹花龙纹钵、莲花纹钵、辐射纹荷叶器座、辐射纹敛口花钵(藏河南),暗花双鱼盘(藏英国)。

宋代汝瓷釉下无气泡。笔者曾用5倍、10倍、50倍放大镜反复观察,30余件汝瓷,件件如此,无一例外。现代有的仿汝瓷同样没有气泡,因此可以这么说,凡是宋代汝瓷,釉下无气泡;无气泡瓷器,不一定是汝瓷。宋代汝瓷的比重比现代汝瓷仿品的比重小。任何物体遇热膨胀,遇冷收缩,汝瓷器经过近千年的热胀冷缩,就会出现物理学上的“膨化现象”,比重变小。笔者经过测试,宋代汝瓷的比重在2.0-2.2之间,而现代汝瓷仿品则在3.0之上。宋代汝瓷敲击时,声音低沉。因为汝瓷是高岭土烧造的,结构不坚密。现代汝瓷仿品敲击时,则发出清脆响亮的声音。宋代汝瓷有标准的蟹爪纹。因为螃蟹是立行,不是爬行,在沙难上会留下一个个孤立的小洞,而宋代汝瓷立确是“汁中棕眼隐若蟹爪”。现代仿品则看不到这种蟹爪纹。
宋代汝瓷釉面反映淡淡红色。因为汝窑釉料有红玛瑙成份,所以汝瓷釉面才能反映出淡淡的红色。现代汝瓷仿品,无论怎么看,也看不到淡淡红色。宋代汝瓷器大部分是天青色。因为公元1107年,北宋徽宗皇帝在居室看到一只天青色瓷器,非常高兴,窑厂投其所好,所以大部分汝瓷贡品为天青色,即有粉青、卵青、灰青,都离不开天青这个基调。现代汝瓷仿品,还未仿出宋代汝瓷的天青色。宋代汝瓷缺乏玻璃质感而有玉质感。这是玛恼釉的重要特征。而现代汝瓷仿品则相反,有玻璃质感无玉质感。
汝窑之不凡在其釉色,釉色以天青为主要颜色,亦包含天蓝、粉青、月白等色,有“雨过天青云破处,这般颜色作将来”的美誉。汝民窑的釉色则丰富多彩,不同釉色间有明显的地域性,即同种釉色的汝瓷主要由某一地区所生产。从宝丰清凉寺汝窑遗址出土的汝官窑瓷片分析,器型主要有碗、盘、钵、瓶、洗、盏、水仙盆、尊、盖等几类。采用手拉坯的方法制作,技法熟练。碗、盘为日常生活器皿,故造型简单大方,仅以十瓣瓜棱形或莲口式予以点缀,美观实用。钵造型成敛口,下有凹圈足或矮圈足,小巧典雅,富有生趣。
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