Double-Ring Graphite Crucible (1kg/2kg/3kg):​​
✅ ​1kg Capacity​ → 0.6kg 24K Gold / 1.1kg Fine Silver / 0.8kg Copper (Precision Small Jewelry)
✅ ​2kg Capacity​ → 1.6kg 24K Gold / 2.2kg Fine Silver / 1.2kg Platinum (K-Gold & Ingot Production)
✅ ​3kg Capacity​ → 2.8kg 24K Gold / 3.5kg Fine Silver / 3kg Brass (Industrial Precious Metal Refining)
🔥 ​Double Anti-Stick Grooves × 1800°C Corrosion Resistance × 200+ Furnace Cycles Lifespan!​

Core Product Features​：
​Industrial Grooved Design​：
Deep-tread grooves prevent metal adhesion + enable one-handed furnace extraction.
→ ​Reduce precious metal waste by 95%​​ vs smooth crucibles.

Grade Thermal Performance​：
-Withstands ​5000°F (2760°C)​​ in vacuum/gas furnaces.

​Ceramic-Glazed Longevity​：
Proprietary-coating provides ​3X lifespan​ vs standard crucibles.
→ ​200+ melts​ guaranteed with proper maintenance.

​Precision Metallurgy Ready​：
99.97% carbon purity → Zero contamination in gold refining.
Boron nitride-ready surface for copper/platinum alloys.