... 2,Mildew-Resisted 3,Environmentai Safe 4,100% Recyclable 5,Paper Honey Comb Sandwich Panel Yancheng Yesheng Color Steel Co., Ltd ... produces industrial fire-retardant and mildew-resisted honeycombed paper-board.Our products are environmental safe and 100% recyclable. Our ... with honeycombed boards with various area densities,honeycomb-sizes,and paper materials.