Add too much in the process of production mold silicone oil, silicone oil destroyed the molecular weight of the silica gel, so the mold can appear the phenomenon such as fewer rolling over not durable.If do small decorative pattern more complex products, with high hardness of silica gel to open mold, can appear the phenomenon of fewer rolling over, because the silicone hard time will be very fragile, easily broken.On the contrary, if make building products with small hardness of silica gel to do the mold, the results also is not satisfied.Because the silicone is too soft, its tensile and tear strength will reduce, will make mold deformation, so it will reduce number of rolling over.Mould plastic itself is very good quality, silica gel is no good or bad, only suitable for and not suitable for.We should use suitable for the size of the product hardness silicone to make the mould won't appear this kind of situation.