Treatment of materials, namely, chemical treatment of textiles, finishing and coating of textiles, and chemical treatment of nonwoven, knitted and woven textiles; Treatment of materials, namely, leather staining, leather dyeing and leather working; Treatment of materials, namely, chemical treatment of yarns; Treatment of materials, namely, paper treatment and paper finishing; Treatment of building materials, namely, treatment of wood for preservation purposes; Treatment of furs; Working of le...