Ultrafine and Micronised Grades
The finest cuts, for premium coatings, inks, sealants and engineering plastics.
Overview
About this product
Ultrafine and micronised grades are the finest cuts of ground calcium carbonate. The particles are small enough to give a very smooth finish in thin films and sealants.
They are supplied uncoated or coated, depending on the system they go into. Exact sizes are confirmed in the quotation.
- Around 5 microns and finer
Sizes
Available sizes.
About 5 microns and finer
Equivalent to 2500 mesh and finer
Uncoated or coated
Confirmed in the quotation
Specification
Specification table.
| Property | Typical value |
|---|---|
| CaCO3 content | 98% minimum |
| Whiteness | 94% or higher |
| Brightness | 94% or higher |
| Moisture | 0.3% maximum |
| Particle size, D50 | 1 to 2 microns |
| Particle size, D97 | 5 microns maximum |
| Oil absorption | 18 to 28 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.
- Very smooth finish in thin films
- High whiteness and brightness
- Good for sealants and inks
- Suits engineering plastics
Packing
Packing options.
- 25 kg polypropylene bags
- Jumbo bags, 1 to 1.25 tonne
- Palletised
Palletised or loose loaded, with custom branding on request. See Quality and Logistics for shipping terms.
Related
Related products.
Uncoated Calcium Carbonate Powder
Ground to mesh grades for paint, paper, putty, adhesives, ceramics and rubber.
View product- 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
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.