What is the relationship between the compression strength of the sand core and it's breaking strength during casting.I am doing compression testing on silica sand cores made from cold boxes and I'm not sure if the results obtained can be used to determine if the core will not break during casting.The compression results are not always consistent even though the Loss on Ignition test results are consistent, for example a pipe core would a correct total binding content (TBC) but breaks during casting.Anyone out there to help.