1.Black semiliquid , mixed by CBF and soft pitch.

1.常下黑色半流体，主要由碳黑油和沥青混配成。

2.CBF can neutralize some electric charge of colloidal particles and make colloidal particles to sedimentate.

2.CBF可以中和体颗表面的部分电荷，使稳沉淀。