双乐股份：公司主要从事酞菁系列及铬系颜料的研发、生产、销售，产品用于油墨、涂料和塑料等领域的着色

Group 1 - The company primarily engages in the research, production, and sales of phthalocyanine series and chromium-based pigments [2] - The products are utilized in coloring for inks, coatings, and plastics [2] - The company responded to an investor inquiry regarding its involvement in the processing of aromatic amine raw materials, clarifying that its operations do not primarily include the synthesis production of aromatic amines [2]