JFZ is an organic ester hardened basic phenolic resin, JFC is a self-hardening basic phenolic resin cured with CO2, and its appearance is brownish red liquid. It has the following characteristics: a: The resin does not contain nitrogen, the curing agent does not contain S.P, to avoid the increase of S on the surface of the casting, the deterioration of the structure, the hot cracking of the casting, the nitrogen hole, etc ...