In fact, the name "magic mirror" did not exist in ancient times, but we call it "magic mirror" in modern times. As we all know, copper is smelted into bronze ware, and its surface roughness is very high, but the surface is not so smooth, so it will not transmit light. The ancient book "Ancient Mirror" records that "if the sun shines on it, there will be a picture on the back, and the ink will enter the shadow, and the fiber will not be damaged", which means that the text image on the back of this bronze mirror will appear when it is irradiated by the sun, so people call it "magic mirror".
So, what's with this magic mirror? Since the founding of the People's Republic of China, experts have never given up their investigation and study of this incident. In the late 1980s, a China scholar was very interested in a cultural relic collected by the Shanghai Museum and studied it. This mirror is different from historical records. The most surprising thing is that this ancient mirror can transmit light. Experts immediately set up a research group to study the history of this ancient mirror, and the principle research of this ancient mirror was also put on the agenda. In the end, the truth of this "magic mirror" was also revealed.
It turns out that when the bronze mirror was cast, the curvature of its surface was insufficient, which was a unique process for the ancients to cast this mirror. The inscription and image on the surface of the bronze mirror are thick, but there is no inscription, and the other parts of the image are thin, so casting stress occurs. When natural light such as sunlight comes in, there will be a back image, which makes people feel that they can really "transmit light", and the saying of "looking in a demon mirror" has spread like wildfire, and everyone knows it.
We saw in the famous actor and director Stephen Chow's work "A Chinese Odyssey" that the owner of the Supreme Treasure saw Xia Zi and Spider Spirit clearly in the demon mirror, as well as the secret of the Monkey King and the Great Sage of the Monkey King. These "magic mirrors" with the color of "myth" are all adapted from records in ancient books. As for the authenticity, we don't have to pursue it, but different people have different opinions.
There are thousands of historical relics in China, including bronze mirrors and ancient mirrors, and each mirror has endless mysterious stories or historical stories. Most of them are just ordinary historical relics, and a few ancient mirrors similar to "magic mirrors" have the magical effect of "light transmission". To tell the truth, in the literature we know now, we have a good understanding of ancient crafts, which are far from modern times. However, the production level of this "magic mirror" really puzzled experts at first. Is that really the case? However, there are some historical "rare treasures" in ancient historical relics and some national first-class cultural relics, which can not be explained so far, representing the rare level of ancient special craftsmen, and can be described as ingenious. As for how this bronze mirror was used in ancient times, it remains to be seen from the results of professional investigations in the future. This temporary puzzle remains to be seen.