Duplex board is a kind of paperboard or cardboard. It is called duplex board because it is made up of two layers, or plies. The exterior of the board is very often coated to make it more water-resistant and to give it a glossy sheen. Duplex board is tough, thin and able to take on a bright white appearance, unlike common corrugated cardboard. It is commonly used to create boxes for a variety of small goods. For example, it is often used in pharmaceutical packaging. It is also used to make garment boxes and cigarette packs, paper plates and cups, and in the food industry. Milk cartons can be made out of duplex board, and wines and liquors packaged in boxes may be inside duplex board containers. Duplex board used in the food industry is not made from recycled paper for hygiene reasons, but sometimes waste paper is used when the board is designated for other purposes. Other common uses for duplex board is match boxes, book covers, and greeting cards. This kind of duplex board is relatively lightweight. Technical Specification For Available Product Specification LWC HWC No Substance (GSM) Caliper (Microns) Stiffness Stiffness MD CD MD CD 1 230 280 65 30 65 30 2 250 300 80 40 85 40 3 285 340 100 50 105 55 4 300 370 120 60 125 60 5 320 390 130 65 135 65 6 350 430 160 80 160 80 7 400 490 200 100 200 100 TOL ± 5% ± 5% ± 10% ± 10% 1 Brightness (Photo Volt) % 67.0 min 70.0 min 2 Bulk Cc/gm 1.22 min 1.22 min 3 Cobb - Top Gm/M2/Min 110 50 4 Cobb - Bottom Gm/M2/Min 240 120 5 Moisture Contents 250 GSM % 5.80 - 6.0 5.80 - 6.0 251 to 300 GSM% 6.0 - 6.5 6.0 - 6.5 350 GM Above % 6.5 - 7.0 6.5 - 7.0
