Carbon Black, PE, PP manufacturer / supplier in China, offering Copy Office Paper A4 Size 70g 75g 80g White 102-104%, A4 Copy Printing 70g Letter Legal Long Size Draft Double-Sided White Printer Office Copy Paper, A4 Paper 80 GSM 70 GSM 500 Sheets OEM Brand A4 Size Paper Copy Bond Draft Double White Printer Office A4 Paper and so on.