300g black cardboard duplex

 3. Single black cardboard. Abbreviations: single black cardboard, black black cardboard. Features: green dye, recyclable processing, pollution-free, two color color, after the US spent beaten pulp production, very high tensile strength, weight from 180-450g are in stock, more than 450g can be mounted co. The duplex black cardboard: Simple duplex black, single black 5: gray paperboard outlets, fine paper, through the heart of black, strong and thick, quantitative large thick paper, folding a good smooth surface, stiffness Good, good tensile, high resistance to break and so on. Suitable for albums, frames, backplane, gift boxes, jewelry boxes, phone boxes, shoe boxes, stationery, clothing tag, notebooks, calendars, hand bags and Loudspeakers, electronic pads and various crafts packaging.