What's the use of a blindfold for glasses?

Glass is transparent, and at the same time it will produce specular reflection. The lighting is simple. It turns out that the photographer used a lamp with a soft light device, and the lamp was placed behind the opalescent transparent film of Foba Translum (a piece of white plexiglass with a dull surface is certainly ok, but it is difficult to fix). A black plexiglass as the background. Its smooth surface energy produces direct specular reflection different from the double mirror effect of glass, which reduces the color tone to be darker than the main body.