... melting, saponifying, vacuum drying and cooling, milling soap noodles, vacuum extruding and then cutting into soaps ... oil, tallow oil, etc.), caustic soda (NaOH), sodium-chloride (NaCl), sodium silicate, fragrance, pigment, etc. 3. Production Process ... : Mix and melt oil --> Saponification --> Add other ingredients --> Vacuum drying --> Soap ...