Once this procedure was completed, the muffle was closed by joining both counterparts. It was then taken to a hydraulic press, with 400 kg pressure. It was then left for 24 hours to vulcanize Figures 27 and 28.
Finalizado este procedimiento, se cierra la mufla uniendo las dos contrapartes y se lleva a una prensa hidráulica con una presión de 400 kg. Se deja vulcanizar por 24 horas Figuras 27 y 28.