Need to install a lamp in front of the mirror, the principle is like a shadowless lamp in the operating room. Through the light irradiation, the light on the face is sufficient, thus reducing the umbra. Let the shadow part of the face disappear completely. In fact, to put it bluntly, it is to highlight facial skin.
Historical information of mirrors
In 1 century, large mirrors that can reflect the whole human body began to appear. In the Middle Ages, portable small mirrors were popular in ivory or precious metal boxes with combs. From the end of 12 century to the beginning of 13 century, glass mirrors with silver or iron backs appeared. Venice was the center of mirror making in the Renaissance, and the mirrors produced were famous for their high quality.
/kloc-in the 6th century, the cylinder method was invented to make flat glass, and at the same time, the tin amalgam method was invented to attach tin foil to glass with mercury, and the number of metal mirrors gradually decreased. /kloc-in the second half of the 0/7th century, French inventors made flat glass by casting, and made large glass mirrors with high quality. Mirrors and their frames are increasingly becoming interior decoration.
/kloc-A big mirror was made at the end of 0/8, which was used in furniture. Although the tin amalgam method is harmful to human body, it has been continuously applied to19th century. 1835, the German chemist Le Biegel invented electroless silver plating, which made the application of glass mirrors more popular.