Ang Cangzhou Xincheng Weiye Chemical Co., Ltd ay gumagawa ng solvent red dyes sa loob ng 27 taon, kabilang ang solvent red 23, solvent red 24, solvent red 25, solvent red 49, solvent red 111, solvent red 196, solvent red 179, solvent red 52, solvent red 218. Ang solvent red 24 at red 49 ay malawakang ginagamit sa pangkulay...
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