Ground Calcium Carbonate (GCC, Paper Grade)
CAS Number: 471-34-1
Ground calcium carbonate (GCC) is mechanically produced from natural limestone or marble, offering a cost-effective filler and coating pigment for papermaking. It provides good brightness, opacity, and smoothness in both wet-end filling and surface coating applications. GCC is the most widely used mineral filler in global alkaline papermaking due to its abundance and competitive cost.
Technical Specifications
| appearance | White powder or aqueous slurry |
| brightness (ISO, %) | ≥ 93 |
| residue on 45μm sieve (%) | ≤ 0.01 |
| moisture content (powder, %) | ≤ 0.3 |
| median particle size (d50, μm) | 0.7–5.0 |
Applications
- Wet-end mineral filler in alkaline papermaking
- Coating pigment base in paper and board coatings
- Brightness and smoothness improvement in copy paper
- Newsprint and publication gravure paper filler
- Board grades bulk and opacity enhancement
Key Features
- Cost-effective natural mineral filler for high-volume use
- Available in multiple particle size distributions for coating and filling
- High purity with low grit content to protect paper machine wires
- Stable supply as aqueous slurry or dry powder
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