... acoustic panel is made up of wood or MDF, glass cotton, nonwoven and decorative cloth, the density of the glass cotton is different, such ... as; 16k, 32k, 48k, 64k, 80k, 96k.64k means the weight of 1M3.The ... cloth. Colophony can be also wiped at the edge of the glass cotton instead of the MDF, and also could be made to ...