For its excellence in flexural rigidity and hardness, Nylon(PA) substrate is recently popular used as a substrate for cellular phone, and laptop etc. Especially aromatic type of Nylon substrate has low water absorption, yet solvent resistant, and it has been developed in various grades like composite type of plastics such as carbon fiber-reinforced, glass fiber-reinforced, and filler-reinforced. PANUCO PA is a primer developed for above purposes, and it is applicable for a variety of usage on aromatic type of Nylon substrates, and has a potential to be a major engineering plastic to be utilized.