I HAVE SOME ROUGH DOTS ON COOKER RING.It is not regular problem sometime occur sometime not. molding temperature 180 time 24sec.Formulation
nbr sibur 3345 100 phr
carbon 550 40 phr
calcium carbonate 35 phr
steric 3 phr
zinc oxide 6 phr
dop 6 phr
After that mixing i separately add sulphur zdec...