1. Different thickness:
The thickness of hard oxide is thicker than that of ordinary oxide. Generally, the thickness of ordinary oxide film is 8–12 um, and the thickness of hard oxide film is generally 40-70 um.
2. Different hardness:
Hardness: Normal oxidation is generally HV250-350, and hard oxidation is generally HV350-550.
3. the temperature is different:
Normally around 18-22°C, it can reach 30°C with additives. If the temperature is too high, powder or cracks are likely to appear; hard oxidation is generally below 5°C, relatively speaking, the lower the temperature, the higher the hardness.

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