Carbon Type EC10 EC10A EC4 EC1 Observation 1 0.5 0.31 0.2 0.1 Observation 2 0.55 0.07 0.28 0.16 Observation 3 0.55 0.25 0.12 Observation 4 0.36 0.18 Observation 5 0.56 Observation 6 0.2