The manufacture of rubber seed shell biobriquettes have been made with variations in activation time and resin resin concentration and their characterization according to SNI 01-6235-2000. Rubber seed shells are carbonized in a pyrolysis reactor at a temperature of 400 to 500°C for 165 minutes. The rubber seed shell charcoal is ground then blended and sieved using a 60 mesh sieve. The rubber s…