The ceiling decorative panel made of gypsum board is generally 500mm x 500mm and 600mm x 600mm. It has sound-absorbing effect, fire-retardant fire-retardant, new product positioning point waterproof and fireproof gypsum board. It does not require artificial bombs, which saves time and labor. In the purchase of gypsum board, through visual inspection, that is, the front of the plate visually, if the surface is smooth, no pores, stains, cracks, missing corners and color imbalance, the upper and lower two layers of kraft binding, its quality is higher. You can also hit the plasterboard by hand. If the sound is very solid, it means that it is very durable. If you make a very empty sound, it means there is a hollow drum inside. In addition, the packaging box should have the product's name, trademark, quality registration, manufacturer's name, date of production, and signs of moisture protection, careful handling, and product marking. Building Materials Knowledge Nature Flooring Del Floor Home Furnishing Window IKEA Home Decoration Space Decoration Home Furnishing Mascara Tube,Existing Mould,Plastic Mascara Tube Anda Aluminum Co., Ltd. , http://www.chinacosmeticbeauty.com