Micro Fine Powder

Made in Tanga, Tanzania

At a glance

Whiteness 93–97% · Brightness 90–93%

Micro Fine Powder

Micro Calcite

Name: Micro Calcite
Brand: Newport Minerals

Premium CaCO₃ from natural calcite and marble.

A high-purity, white calcium carbonate (CaCO₃) powder produced by crushing, grinding, and classifying natural calcite or marble. Our advanced classification technology allows precise control over particle size distribution, ranging from 2 microns (µ) to 45 microns (µ).

Whiteness 93–97% · Brightness 90–93%

Customisable D97 from 250 µ down to 8 µ

Packed in 25 kg or 100 kg jumbo

Request a Quote

Key Features

Premium-grade. Made for decorative.

Features

(8)

Ultra-fine to fine particle range

Customizable grading

High brightness & whiteness

Narrow particle size distribution

Low moisture content

Chemically pure

Low oil absorption

Soft & easy to disperse

Technical Specifications

Engineered to spec — every batch lab-checked.

93–97%

Whiteness

90–93%

Brightness

2.71

Specific Gravity

≤ 0.10%

Moisture

Physical Properties

Whiteness

93–97%

Brightness

90–93%

Specific Gravity

2.71

Moisture

≤ 0.10%

Bulk Density

0.80–1.20 (depending on particle size)

Oil Absorption

19–23 (depending on particle size)

LOI

40–43%

Chemical Composition

CaO

72–75%

MgO

4.73–5.9%

0.13%

0.02%

0.24%

0.02%

SiO₂

≤ 2.42%

Particle Size

D97

250 µ – 8 µ (customisable)

D50

45 µ – 2 µ (customisable)

Packaging

25 kg bags

100 kg jumbo bags

Particle Size Distribution

A consistent, narrow distribution — batch after batch.

Below is a representative distribution curve for Micro Calcite. The blue cumulative (Cum%) curve and orange differential (Diff%) curve together describe how mass distributes across particle sizes — narrow distribution means consistent product behaviour.

D10 1.607 µm 10% of particles are smaller than this size

D50 5.221 µm Median — 50% of particles are smaller

D90 11.52 µm 90% of particles are smaller than this size

Industrial Application

Where Micro Calcite is used.

7 use cases

Use Case 01

Paints & Coatings

Use Case 02

Plastics & Masterbatch

Use Case 03

Adhesives & Sealants

Use Case 04

Animal Feed

Use Case 05

Ceramics & Glass

Use Case 06

Construction & Building Materials

Use Case 07

Paper & Pulp

How To Order Custom Grades

Provide your target D50, D90, or D97 values

Specify top cut limit (maximum particle size allowed)

We will produce a trial batch for your approval

Custom Particle Size Production

Engineered to your spec.

We can produce any particle size distribution within the 2µ to 45µ range based on your specific requirements.

Calcite offers higher whiteness and lower hardness than dolomite, making it preferred for premium decorative applications including wall putties, paints, textures, sealants, plastics, adhesives, and construction chemicals.

Request a Custom Grade

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