石墨乳的主要成分是石墨（微粉石墨）黑灰色；有油腻感，可污染纸张。硬度为1～2，沿垂直方向随杂质的增加其硬度可增至3～5。比重为1．9～2．3。在隔绝氧气条件下，其熔点在3000℃以上，是最耐温的矿物之一。常温下石墨粉的化学性质比较稳定，不溶于水、稀酸、稀碱和有机溶剂。
，铸造涂料是铸造过程中覆盖在型芯表面以改善其表面耐火性，化学稳定性，抗金属液冲刷性，抗粘砂性等性能的铸造辅助材料；铸造涂料可制成浆状，膏状或粉状，用喷，刷，侵，流等方法涂敷在型芯表面。能延长模具的使用寿命1-3倍．具有良好的润滑性、脱模性、化学稳定性、高温附着性、提高模具使用寿命和锻件质量。不污染环境，使用方便。
The main component of graphite emulsion is graphite (micro-powder graphite) black-gray; it has greasy feeling and can pollute paper. The hardness is 1-2, and increases to 3-5 along the vertical direction with the increase of impurities. The specific gravity is 1.9-2.3. Under the condition of oxygen isolation, its melting point is above 3000 C, which is one of the most temperature-resistant minerals. At room temperature, the chemical properties of graphite powder are relatively stable, insoluble in water, dilute acid, dilute alkali and organic solvents.
Foundry coating is a casting auxiliary material covering the core surface in the process of casting to improve its fire resistance, chemical stability, anti-metal liquid scouring and anti-sticking properties. Foundry coating can be made into slurry, paste or powder, which can be applied on the core surface by spraying, brushing, invasion, flow and other methods. It can prolong the service life of the die by 1-3 times. It has good lubricity, demoulding, chemical stability, high temperature adhesion, improving the service life of the die and the quality of forgings. It does not pollute the environment and is easy to use.