Lifting presents as a wobbly leather-like surface and is typically the second stage of a buckling defect. This indicates that the sides of the pyramid cracked and prewet and/or slurry trapped in the shell has seeped through the cracks and filled the shell cavity. 

 

The causes of this defect are evident in the wax and shell portions of the process. To cure these causes, R&R recommends taking the following actions.