Uncoated Calcium Carbonate
Uncoated ultra-fine calcium carbonate (CaCO₃) is a high-purity, finely ground mineral additive used in various ink formulations. Unlike coated calcium carbonate (which has a surface treatment like stearic acid for better dispersion in plastics), uncoated CaCO₃ retains its natural hydrophilic properties, making it suitable for water-based and some solvent-based inks.
Key Characteristics
- Particle Size:
- Ultra-fine grades typically range from 0.5 to 2 microns (some precipitated CaCO₃ can be even finer).
- Provides smooth ink flow and better printability.
- High Brightness & Whiteness (90-98%)
- Enhances opacity and color consistency in inks.
- Chemical Purity (≥ 98% CaCO₃)
- Low impurity levels (minimal silica, iron, or heavy metals) ensure stability in ink formulations.
- Uncoated Surface (Hydrophilic)
- Naturally disperses well in water-based inks (no need for additional surfactants).
- May require dispersants in solvent-based systems.
- Low Oil Absorption
- Helps maintain ink viscosity without excessive thickening.
Advantages Over Coated CaCO₃ :
✔ Better dispersibility in water-based systems (no hydrophobic coating interferes).
✔ Cost-effective (no additional surface treatment).
✔ Higher chemical compatibility with pH-sensitive inks
5 -70 micron
our product range
96%
Whiteness
96 %
Brightness