an apparatus for joining two optical discs into a disc assembly having multiple layers of data has a disc processing chamber for supporting the first and second discs , wherein each of the discs has a layer of data on a first side thereof . the processing chamber is fluidly connected to a tank containing a bonding fluid . a vacuum pump is selectively connectable to the processing chamber and the tank for selectively evacuating air out of each . an actuator is operatively mounted within the processing chamber and supports the first disc . the actuator moves the first side of the first disc into contact with the first side of second disc after the processing chamber has been evacuated and a bonding fluid is placed on one of the first and second discs , thereby forming a disc assembly having multiple layers of data .