铜镜就是古代用铜做的镜子。在古代，铜镜与人们的日常生活有着密切关系，是人们不可缺少的生活用具。铜镜又是精美的工艺品。它制作精良，形态美观，图纹华丽，铭文丰富，是我国古代文化遗产中的瑰宝。它的质料包括金、银、铜、铁等，以铜最为多，也有镀金银的、背面包金银的、或镶嵌金银丝的。隋唐以来，还有带柄的、四方的，各种花纹应有尽有。
The mirror is made of bronze mirrors in ancient times. In ancient times, there is a close relationship between the mirror and the daily life of people, is an indispensable tool of life. The mirror is exquisite handicrafts. It is well produced, beautiful shape, gorgeous figure pattern, rich inscriptions, is the treasure of our ancient cultural heritage. Its materials, including gold, silver, copper, iron and so on, with the most of copper, there are also gold plated, silver, gold or silver, or mosaic of gold and silver wire. Sui and Tang Dynasties, and with a handle, square, all kinds of patterns.
铜镜的特点是:形体轻巧，纹饰精致，线条流畅，一扫前期铜镜幼稚朴拙的风格，展现出青铜工艺的新面貌。此时铜镜多为圆形。纹饰表现手法多样，有浅浮雕、高浮雕、金银错、嵌石、彩绘等。图案多采用地纹衬映主纹手法，主纹地纹相映成趣，图案显得完善而和谐。
The mirror is characterized by: lightweight body, exquisite ornamentation, smooth lines, swept away early Bronze Mirror sincere childish style, show the new face of bronze technology. The mirror is round. There are many ways of expression, such as shallow relief, high relief, gold and silver fault, inlay, painting and so on. The use of the pattern and the main design pattern approach, the main lines lines side by side, the pattern seems perfect and harmonious.
西汉初期至武帝时期，铜镜逐渐厚重，纽多作半球形，或作柿蒂形。图案布局和纹路也有新的变化，出现了以四乳钉为基点组织的四分法布局形式，主纹突出，地纹逐渐消失。主题纹饰素朴，图案结构简单，改变了战国时期那种严谨的细密风格。西汉晚期至东汉中期，规矩镜成为最精美的类型，纹饰以四神为主，图案有四神、动物、禽鸟及群邪、羽人之类，活泼生动。纹饰布局突破了"心对称"古样设计，出现了"轴对称"式新风格。而到宋代在经济和科学技术上有较大的进步，反映在铜镜工艺发展上又出现了一个高潮。但由于铜的产量所限，宋朝铜禁比较严，只是铜制品不多。
The early Western Han Dynasty to Emperor Wu of Han Dynasty, bronze mirrors gradually thick, more new hemispherical or persimmon shape. Pattern layout and lines also have a new change, the emergence of the four breast nail as the basic point of the organization of the four points of the layout of the form, the main pattern prominent, the pattern gradually disappeared. Theme decoration simple pattern, simple structure, changes in the Warring States period that rigorous fine style. The late Western Han Dynasty to the mid Eastern Han Dynasty, the rules become the most exquisite mirror type, ornamentation to Sishen, patterns, animal, birds and Qunxie Sishen, feather like, lively. The layout of the pattern breaks through "the symmetry of the heart" and the new style of "axial symmetry". To the Song Dynasty in economy and science and technology has great progress, reflected in the mirror of technology development and the emergence of a climax. However, due to the limited production of copper, the Song Dynasty copper is relatively strict, but not many copper products.
此面镜子为铜制，直径为10.7cm，称四乳钉，此面四乳钉铜镜最特别之处是他的款式，可以看的到，这面镜子和其它镜子不同得是他不是一个平面的，在一个很窄的边缘后，中间是凹进去的，这样的款式对制做就造成了很大的困扰。经多位专家肯定，此款式的铜镜非常稀少，更被铜镜收藏大家断言如果现在出售了，以后想花十倍的价位收也找不到了。
The mirror is made of copper, the diameter is 10.7cm, said the four nails, the nails four mirror the most special is his style, you can see the mirror, mirror and so different is that he is not a plane, in a very narrow edge, the middle is concave, this style of making it caused a lot of trouble. Certainly by the experts, this style of bronze mirror is very rare, but was the mirror collections we assert that if the sale now, I want to spend ten times the price collection can not find.
那何为乳钉镜呢，又有什么寓意呢。我国古人称“乳钉”为“子”，早在南朝（梁）时期人们就已把饰有“乳钉”的镜子称为“子镜”了。有的西方学者曾认为这些“乳钉”是“擎天柱”，他们在解释装饰有乳钉的镜子时说：镜钮代表中国，即象征茫茫宇宙的中心，镜钮外的方格表示大地，圆形的镜子表示天，即天圆地方，方格四角外四乳钉象征四海，把整个图像和铭文联系起来，表示自己置身于宇宙中央，与宇宙一起运行，周而复始，长生不死，子孙繁昌。
So where is the milk nail mirror, and what is the meaning of it. China's ancient person "nails" as a "child", as early as in the Southern Dynasties period (beam) it was decorated with "nails" called "mirror mirror". Some western scholars believed that these "nails" is Optimus Prime, they decorated with nails in the interpretation of the mirror said: on behalf of the symbol China mirror button, the center of the universe, the mirror button box represents the earth round mirror said that day, the day round place, four square corner nails four the whole symbol world, linked images and inscriptions, expressed themselves in the center of the universe, and the universe run together, again and again, immortal, descendants.