Raw materials: Testing by sample before, during and after unloading raw materials from the truck, and only the qualified is to be received.

Formula: In accordance with customers’ requirements, and confirmed by the formula personnel, quality personnel and laboratory personnel.

Kneading: Kneaded for 25 minutes without pitch, and another 45 minutes with pitch.

Forming: Testing and monitoring the process of forming by quality personnel. Cutting one block each shift to check the internal structure. Only the qualified is to be baked.

Graphitizing: Have own power plant and automatic control currents system. Every block is tested by sample, and only the qualified is to be machined.

Machining: Measuring all sizes of first 10 blocks for every cross section, and then machining in batch after all sizes according with tolerance request.