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NGC Home  ->  About Us  ->  Wallboard, Cement Board, Interior Finishing Products, Company Info  ->  Wallboard Production Wallboard begins with gypsum (calcium sulfate). The mineral is crushed and calcined (baked). Water is added and the liquid slurry is sandwiched between two pieces of paper. After drying, the gypsum wallboard is ready for delivery. Click here to view the process. © National Gypsum Properties, LLC 2001 - 2008 | Privacy Statement

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