Acrylic sandwich is a frame where your print is sandwiched between two layers of Acrylic. These layers are then bolted with metallic studs. Using this mechanism, installation is one time and the print can be changed easily. The thickness of layers can either range from 3mm+3mm to 8mm+8mm but it totally depends on the size and the strength which you require. The borders of the acrylic panels can be believed to make a better visual effect.