The coloring agent project for Tsaihua Technology's filter has broken through international patent barriers. Through innovative molecular design, the dye achieves high light resistance and migration resistance of nanoscale pigment pastes, while also possessing high brightness and transparency, breaking through the technical limitations of traditional pigments. This project successfully integrates unique molecular design concepts and synthesis processes, independently developing high color fastness and high transparency filter colorants, perfectly meeting the stringent requirements of high-end filters for color accuracy and stability.