Black paper also known as the black cardboard or black paper board, generally have virgin wood pulp or recycled pulp and the core is black , there are C1S and C2S . (C1S : Coated One side /C2S : Coated two sides) .The black cardboard is a relatively strong thick thick paper, generally has a double-sided smooth, good stiffness, the characteristics of colour and lustre is stable.
Black card paper is mainly used for making album, DIY album, picture frame back board, gift box, mobile phone box, stationery, clothing tag, notebook cover, desk calendar, hand bag, filter edge, studio album, and speaker electronic gasket.
Of course, according to the use of black card paper, its specifications and weight is also different, the following dongguan tianshan paper co., ltd. for your detailed explanation:
Used for the production of picture frame back plate, gift box black card, generally is a single black card on a gray background, the common weight of 180-600g, and used for the production of speaker speaker gasket black card specification is slightly smaller, generally between 0.5-3mm, and known as the electroacoustic black card.

Double-sided transparent black card paper, thickness of 0.1-0.54mm, more weight can be processed and compounded, all-wood pulp black card paper, weight of 110-450g, thickness of 0.13-0.54mm.