PPGI coil matte karo sinyal werna irengnggunakake baja galvanis minangka substrate.lumahing coil baja ppgi ditutupi karo lapisan utawa sawetara lapisan saka nutupi, liwat baking lan curing, banjur dadi PPGI.Saliyane proteksi lapisan gi, lapisan organik nglindhungi kumparan baja sing dilapisi warna saka karat, lan urip layanan kira-kira 1,5 kaping luwih suwe tinimbang kumparan baja galvanis.
Warna pupolar kumparan baja ppgi matte:
- sinyal ireng: ral9004
- areng: ral7016
- bata abang: ral3000
- coklat / maroon: ral8017
- kothak abang: ral3022