What is pure graphite powder?

    Graphite powder soft, black gray;Greasy feeling, can pollute the paper.The hardness is 1 ~ 2, and it increases to 3 ~ 5 with the increase of impurity along the vertical direction.The specific gravity was 1.9 ~ 2.3.It is one of the most temperature-resistant minerals with a melting point of more than 3000℃ in oxygen isolation.At room temperature, the chemical properties of graphite powder are relatively stable, insoluble in water, dilute acid, dilute alkali and organic solvents.