A commercial Novolac epoxy resin(MG-997) was cured with novel MEKP and cobalt naphthenate with two type material mold of stainless steel and pastic.The two kind of samples was heated treatment at 170℃ 1h.The glass transition temperature (Tg) values derived from loss modulus peak of DMA Spectrum.The Tg values cured from the plastic material mold was higher than that cured through the stainless steel mold.