Color, f_ ester, %fª density, g/cm3 acidity, f_% heat loss, %f_ fp, f¦fª color (pt-co) after heating, f_ volume resistivity, ¬+.Cmfª Premium grade 30 99.5 0.982-0.988 0.010 0.2 195 75 1.0f-10n Grade i 40 99.0 0.982-0.988 0.015 0.3 192 -- none Regular grade 120 99.0 0.982-0.988 0.030 0.5 190 -- -- 0000