Ground Calcium Carbonate (CACO3)
Our Ground Calcium Carbonate (GCC) is not a byproduct; it is a primary engineered material derived from the same high-purity Lampung Crystalline Stone deposits that yield our famous White Crystalline marble.
Ground Calcium Carbonate: The Pure Foundation of Industry
Introduction: A Symphony of Light and Stone
At PT Gramer Indonesia, our expertise extends beyond the visible beauty of marble slabs into the microscopic world of industrial minerals. Our Ground Calcium Carbonate (GCC) is not a byproduct; it is a primary engineered material derived from the same high-purity Lampung Crystalline Stone deposits that yield our famous White Crystalline marble.
We transform raw calcium carbonate into a critical performance additive for the global manufacturing sector. By utilizing advanced ball-milling and air-classification technologies, we achieve particle sizes as fine as 9 microns, delivering a product defined by its exceptional whiteness, low abrasivity, and chemical consistency.
The Manufacturer Advantage:
Vertical Integration
We are not just distributors; we are miners and millers. In the industrial filler market, consistency is currency. Because PT Gramer owns the mining concessions in Bandar Lampung, we control the chemical profile of the feedstock before it ever reaches the processing plant.
- Purity Assurance: By selecting only high-grade calcite ore, we ensure a CaCO3 content exceeding 94%, minimizing silica and magnesium impurities that can damage your processing machinery.
- Supply Stability: Our vertical integration guarantees a continuous supply chain for high-volume industrial clients, unaffected by third-party raw material shortages.
- Moisture Control: Our processing facilities maintain strict moisture levels (Max 0.2-0.3%), crucial for preventing defects in hydrophobic applications like plastic extrusion.
Industrial Applications
Product Grades and Granulometry
We categorize our products by “Mesh” size and “D98” (top cut) values, offering a range from fine powder to ultra-fine micronized dust.
- Standard Fine (Mesh 800 – 1200): The workhorse grades for general filling applications in rubber and standard paints.
- Super Fine (Mesh 2000): High-performance fillers for plastics requiring smooth surface finishes.
- Ultra Fine (Mesh 2500 – 5000): Our premium tier for demanding applications requiring maximum dispersion and gloss control.
Industrial Applications: Enhancing Performance
Our GCC is engineered to serve as a functional filler across a spectrum of industries, adding value far beyond simple volume cost-reduction.
Plastics & PVC:
- Functions as a rigidifying agent in PVC pipes, profiles, and cables.
- Our high-whiteness grades (GM 25) reduce the need for expensive Titanium Dioxide (TiO2) pigments.
Paints & Coatings:
- Acts as a premium extender in interior and exterior emulsions.
- The controlled particle size distribution ensures optimal opacity, brightness, and scrub resistance in the final paint film.
Paper Manufacturing:
Used as a filler and coating pigment to improve paper brightness and printability while reducing pulp costs.
Agriculture:
Our coarser grades act as effective soil neutralizers, correcting pH levels in acidic tropical soils to boost crop yields.
Technical Specifications
Premium Ground Caclcium Carbonate (CaCO3)
Our laboratory analysis confirms world-class purity and brightness levels.
| Product Code | Target Mesh | Particle Size (D98) | CaCO3 Purity | Whiteness | Moisture Content |
| GM 1 | Mesh 100 | 320 +/- 1 micron | 95.37% | 90.60% | Max 0.3% |
| GM 4 | Mesh 325 | 43 +/- 1 micron | 95.66% | 94.25% | Max 0.3% |
| GM 9 | Mesh 800 | 38 +/- 1 micron | 98.3% | 94.4% | Max 0.3% |
| GM 12 | Mesh 1200 | 22 +/- 1 micron | 98.42% | 94.5% | Max 0.3% |
| GM 20 | Mesh 2000 | 10.5 +/- 0.5 micron | 97.7% | 94.7% | Max 0.3% |
| GM 25 | Mesh 2500 | 9 +/- 0.5 micron | 97.8% | 95% | Max 0.2% |
Experience the Masterpiece
Partner with the Source
Whether you are manufacturing PVC pipe or formulating premium architectural coatings, PT Gramer provides the consistent mineral foundation you need. Contact our industrial sales team for technical data sheets (TDS) and bulk pricing.
