Uncoated Calcium Carbonate Powder
Ground to mesh grades for paint, paper, putty, adhesives, ceramics and rubber.
Overview
About this product
Uncoated powder is ground calcium carbonate, milled from natural limestone or marble and graded by fineness. It is the standard filler and extender for water based and general purpose systems.
The grade is named by mesh size. A higher mesh number means a finer powder, from about 75 microns at 200 mesh down to about 5 microns at 2500 mesh.
- 200 mesh (about 75 microns)
- 2500 mesh (about 5 microns)
Sizes
Available sizes.
200 mesh
About 75 microns
325 mesh
About 45 microns
400 mesh
About 38 microns
600 mesh
About 23 microns
800 mesh
About 18 microns
1250 mesh
About 10 microns
2500 mesh
About 5 microns
Specification
Specification table.
| Grade | Approx. size | D50 (typical) | D97 (typical) |
|---|---|---|---|
| 200 mesh | 75 microns | About 28 microns | About 75 microns |
| 325 mesh | 45 microns | About 15 microns | About 45 microns |
| 400 mesh | 38 microns | About 12 microns | About 38 microns |
| 600 mesh | 23 microns | About 7 microns | About 23 microns |
| 800 mesh | 18 microns | About 5.5 microns | About 18 microns |
| 1250 mesh | 10 microns | About 3.5 microns | About 10 microns |
| 2500 mesh | 5 microns | About 1.8 microns | About 5 microns |
| Property | Typical value |
|---|---|
| CaCO3 content | 97% minimum |
| Whiteness | 93% or higher |
| Brightness | 93% or higher |
| Moisture | 0.3% maximum |
| Particle size, D50 | See grade table |
| Particle size, D97 | See grade table |
| Oil absorption | 12 to 20 g per 100 g |
| pH | 9 to 9.5 |
| Specific gravity | About 2.7 |
| Mohs hardness | 3 |
Typical values. A technical data sheet and certificate of analysis are provided with every quotation.
Benefits
Key benefits.
- Natural whiteness and brightness
- Seven mesh grades from coarse to fine
- Lowers formulation cost as a filler
- Consistent fineness within each grade
Packing
Packing options.
- 25 kg and 50 kg polypropylene bags
- Jumbo bags, 1 to 1.25 tonne
- Palletised or loose loaded
Palletised or loose loaded, with custom branding on request. See Quality and Logistics for shipping terms.
Related
Related products.
- Photograph to comeCoated calcium carbonate powder
Coated Calcium Carbonate Powder
Surface treated with stearic acid so it repels moisture and disperses well in polymers.
View product - Photograph to comeUltrafine and micronised grades
Ultrafine and Micronised Grades
The finest cuts, for premium coatings, inks, sealants and engineering plastics.
View product
Tell us what you need and we will send a quotation.
Send the product, grade, quantity and destination port. A technical data sheet and certificate of analysis are provided with every quotation.