The invention discloses a dimming glass based on a 
subtractive color mixing method, which comprises two light-transmitting substrates arranged oppositely, and an adjustment area is formed between the two light-transmission substrates. The adjustment area is filled with a 
liquid crystal mixture, and the 
liquid crystal mixture includes a  Photopolymerized 
liquid crystal monomers, dichroic dyes, ordinary dyes, photoinitiators and negative liquid crystals. When no 
voltage is applied, the negative liquid crystals are arranged in a single domain perpendicular to the light-transmitting substrate, and the 
dichroic dye molecules are also  Perpendicular to the light-transmitting substrate, the 
dichroic dye absorbs the weakest light and presents a colorless state, at which time the light 
transmittance reaches the highest; when a 
voltage is applied, the negative liquid 
crystal turns to a direction parallel to the light-transmitting substrate, turning  During the process, the 
dichroic dye is driven to rotate. Because of the irregular distribution of the 
polymer network, the negative liquid 
crystal turns into a multi-domain arrangement parallel to the light-transmitting substrate, which makes the switchable glass change from the light-transmitting state to the light-scattering state.  According to the method of 
subtractive color mixing, the glass presents a 
colored fuzzy state.