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Posted by Admin on July, 26, 2026
What Quartz Powder Is Best for the Paint and Coating Industry?
The 5 specification priorities for paint-grade quartz powder:
- SiO₂ 98.5-99.5% — chemical inertness that won't react with paint binders or additives over the coating's service life.
- Low Fe₂O₃ — for light-colored and white paint formulations where colour purity is essential.
- Fine, consistent mesh grading — coarser particles create a gritty, uneven film texture; finer, uniform grading gives smooth application and finish.
- Controlled particle shape and hardness — contributes abrasion resistance and scrub durability to the final coating.
- Low moisture and oil absorption — supports stable formulation viscosity and predictable paint performance batch to batch.
Source: Aalok Overseas Technical Laboratory, Rajasthan, India · Manufacturer & Exporter of Quartz Powder to 50+ Countries Since 1992 · www.feldsparindia.com
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AALOK OVERSEAS INDIA · APPLICATION GUIDE #26
SiO₂ Purity · Extender Filler · Fine Mesh Grading · NABL COA · Exporter Since 1992
REQUEST PAINT-GRADE SAMPLE → VIEW SPECIFICATIONSWhy the Paint Industry Uses Quartz Powder as an Extender Filler
In paint and coating formulations, quartz powder serves as an extender filler — a chemically inert, hard, finely ground mineral that bulks out the formulation, contributes hardness and abrasion resistance, and helps control gloss and sheen, all at a lower cost than relying on pigment-grade titanium dioxide alone. Because quartz doesn't chemically interact with the resin binder, its purity, particle size, and shape are what matter most: contamination or oversized particles show up directly as film defects, gritty texture, or reduced durability in the cured coating.
Quartz Powder Requirements by Coating Type
| COATING TYPE | SIO₂ TARGET | TYPICAL MESH |
|---|---|---|
| Interior Wall Paint | 98.0-99.0% | 200-325M |
| Exterior/Weather-Resistant Coatings | 98.5-99.5% | 325M+ |
| Industrial & Protective Coatings | 99.0-99.5% | 325-500M |
| Textured/Sand Finish Coatings | 98.0-99.0% | Coarser, controlled particle size |
What to Verify Before Buying Quartz Powder for Paint
PRIORITY 01
SiO₂ Purity 98.5-99.5%
Chemical inertness is quartz's core value in a paint formulation — verified purity ensures it won't react with binders, additives, or the substrate over the coating's service life.
PRIORITY 02
Low Fe₂O₃ for Colour Purity
Essential for white and light-coloured formulations, where even trace iron can subtly shift the finished paint's tone, especially in high-opacity, premium coating lines.
PRIORITY 03
Fine, Consistent Mesh Grading
Coarser or inconsistent particle size creates a gritty texture and uneven film formation; a tight, verified particle size distribution supports smooth, uniform coating application.
PRIORITY 04
Controlled Moisture and Oil Absorption
High moisture or oil absorption in the filler can disrupt formulation viscosity and require reformulation, adding cost and inconsistency to production.
PRIORITY 05
Per-Lot Documentation
NABL-verified chemistry and sieve analysis on every shipment ensures formulation performance stays predictable batch to batch, rather than requiring re-tuning with every new lot.
The Aalok Overseas Advantage for Paint & Coating Manufacturers
High-Purity Quartz Powder
SiO₂ 98.5-99.5%+, low Fe₂O₃, mesh-graded 200/325/500 to match your specific coating application and formulation requirements.
NABL COA on Every Shipment
SiO₂, Fe₂O₃, TiO₂, LOI, and sieve analysis verified per lot — supporting stable paint formulation performance shipment after shipment.
Mine-Direct Sourcing
Extraction, washing, and milling controlled in-house from Aalok Overseas' own Rajasthan operations, minimizing the contamination risk of blended trader stock.
Bulk Supply Capability
Established production scale supports the continuous, high-volume supply paint and coating manufacturers require.
Why Manufacturers Choose Aalok Overseas
Since 1992, Aalok Overseas has supplied mine-direct, NABL-certified quartz powder to industrial buyers across 50+ countries, including the paint and coating industry. A paint formulation is only as consistent as its filler — verified purity and mesh grading on every shipment is what keeps your coating performance predictable.
FAQ — Quartz Powder for Paint and Coatings
Q
Why is quartz powder used in paint formulations?
Quartz powder is used as a chemically inert extender filler that bulks out the formulation, contributes hardness and abrasion resistance, and helps control gloss, all at a lower cost than relying on pigment-grade materials alone.
Q
What SiO2 purity is needed for paint-grade quartz powder?
98.5-99.5% SiO₂ is typical for paint and coating applications, with higher purity generally preferred for exterior and industrial protective coatings.
Q
Which mesh size is best for quartz powder in paint?
200-325 mesh is common for standard wall paint, with finer grades (325-500 mesh) used for premium and industrial coatings requiring the smoothest film formation.
Q
Does iron content matter in quartz powder for coloured paints?
Iron content matters most for white and light-coloured formulations, where trace Fe₂O₃ can subtly shift the finished paint's tone; it matters less for dark, heavily pigmented coatings.
Q
How do I verify quartz powder quality for a paint formulation before bulk ordering?
Request a NABL-accredited COA showing SiO₂, Fe₂O₃, and sieve analysis, and run a formulation trial to confirm film smoothness, gloss, and colour consistency before committing to bulk supply.
Related Guides
REQUEST PAINT-GRADE QUARTZ POWDER SAMPLE · NABL COA · SIO₂ & SIEVE ANALYSIS
Contact Aalok Overseas — India's Trusted Quartz Powder Supplier for Paint & Coatings
Request free samples of paint-grade quartz powder with NABL-certified COA and MSDS. Mine-direct sourced from Rajasthan since 1992, exported to 50+ countries.
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