Micronized Calcium Carbonate Powder — Uncoated
Mesh 400 Calcium Carbonate — Uncoated Powder
MAD KOOHZAD's mesh 400 calcium carbonate is engineered for formulations that need more precision than a general-purpose filler can give. Its optimized particle-size distribution delivers high whiteness, low oil absorption, and clean dispersion in the finished product. Contact us for current bulk pricing on mesh 400 and technical guidance on fitting it to your formulation.
Tight Particle-Size Control
A closely held distribution within the mesh 400 range, batch after batch.
Higher Finished-Product Performance
A meaningful step up in whiteness and mechanical strength over coarser grades.
Clean Dispersion
Reduces or eliminates the need for stronger dispersing agents.
Competitive Pricing
Direct-from-producer pricing on mesh 400, without distribution markups.
Understanding Mesh 400: Why This Grade Is Built for Precision Work
Micronized calcium carbonate isn't just a filler — it's an engineering input in your formulation. Pick the wrong particle size and you lose performance while picking up hidden downstream costs.
What separates 400-mesh from the grades around it: mesh 400 sits at a genuine sweet spot. It's fine enough to disperse cleanly in lower-viscosity systems — liquid resins, water-based paints — while staying coarse enough to avoid the sharp rise in oil absorption and mechanical-property loss that comes with ultrafine grades like mesh 800 or 1000.
Higher filler loading without losing mechanical properties: mesh 400 lets you replace a larger share of expensive polymer resin with mineral filler without giving up impact strength in plastics or hiding power in paint. That's a direct saving on your most expensive raw material.
Technical Data That Actually Matters for Performance
Confidence in a raw-material purchase shouldn't rest on trust alone — it should rest on data you can verify. We back mesh 400 with full transparency on the numbers that determine how it performs in your process.
High whiteness: means the grade is a genuine fit for applications that demand a clean white base — white PVC, construction paint, and similar formulations.
Controlled D97: guarantees no oversize particle sneaks into your formulation and causes an unexpected defect.
Where Mesh 400 Fits: Formulation Optimization Across Industries
Paint and resin — improving rheology and abrasion resistance: mesh 400 works as a semi-active filler in acrylic and alkyd paints. Its mid-range particle size balances abrasion resistance (favored by slightly coarser particles) against pumpability (favored by finer particles). In water-based paint specifically, loading at 18–25% by weight typically improves durability and reduces sagging.
Polymer, cable, and pipe — mechanical reinforcement: in PVC pipe and profile, it raises rigidity and impact resistance in UPVC and low-pressure pipe while cutting raw-material cost. In cable and wire, it works as a jacket filler that improves dielectric and mechanical properties. In rubber and footwear soles, it reinforces hardness and improves finished surface quality.
Adhesives, mastics, and sealants — precise flow control and anti-settling: in both solvent- and water-based systems, mesh 400 gives the stability needed to prevent filler settling in storage while remaining trowelable or nozzle-applicable without clogging at application time.
Construction materials — density and fill: used in precast concrete, mortars, sealants, and cement-based materials, mesh 400 fills microscopic voids and raises finished density.
Other specialty uses — paper and cardboard: used in surface coating and internal filling to improve opacity and reduce cellulose-fiber cost. Agriculture: as a calcium source in animal feed (subject to food-grade certification). Drilling, oil, and gas: used as a filler in drilling mud for filtration control and pore-pressure management in moderate-pressure wells.
Transparent Sourcing and Pricing at MAD KOOHZAD
We understand mesh 400 pricing has a direct line to your margin. Our approach is simple: producer-grade quality at producer-grade pricing.
Bulk pricing policy — buying direct from the producer cuts out distribution layers, letting us offer competitive rates tied to purchase volume and contract length rather than short-term market swings. Contact us directly for current rates on orders above 10 tonnes.
Mesh 400 — Frequently Asked Technical Questions
Is mesh 400 suitable for masterbatch production?
Yes — mesh 400 is a strong option for polymer masterbatches, particularly where the goal is high loading alongside good extruder flow. For very high-concentration masterbatch, a finer grade (around mesh 500) may give better surface coverage, but mesh 400 usually has the better price-to-performance balance.
What's the moisture level, and does it need re-drying before use?
Packaged moisture is below 0.2%. Stored under dry conditions, it won't need re-drying for the large majority of industrial applications — paint and plastics included.
Do you provide a certificate of analysis (COA) per batch?
Yes. Every shipment ships with a valid certificate of analysis confirming the key parameters for that specific batch — our standing quality-control guarantee.