Industrial Applications

Kaolin for Paper

Improving printability, gloss, and opacity while reducing pulp costs.

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Kaolin for Paper

Paper consists of a mesh of cellulose fibers. However, these fibers leave microscopic voids and rough surfaces that absorb too much ink and allow light to pass through (low opacity).

Kaolin acts as a functional filler and coating. Its fine, plate-like particles slot perfectly into these fiber voids. This creates a smoother surface for sharper printing and scatters light to increase opacity, allowing you to use thinner paper without see-through issues.

  • Increases Brightness (L* > 92%)
  • Reduces expensive wood pulp usage
  • Extends machinery life (low abrasion)

Microscopic View: Fiber Filling

Ink sits on surface (High Holdout) Pulp Fiber Mesh Kaolin Particles

Kaolin platelets creating a smooth printing surface

Performance Characteristics

92% Brightness

Ensures bright, high-contrast paper suitable for commercial printing.

High Fineness

Ultra-fine particles for superior gloss and smooth tactile feel.

Low Abrasion

Our soft kaolin protects your expensive wire mesh and cutting blades.

Recommended Grades

Selected grades for paper manufacturing — from filler-grade bulk applications to premium coated paper and specialty thermal grades.

UT-WHITE High Brightness Kaolin

UT-WHITE

A cost-effective filler grade that adds bulk and opacity to newsprint and paperboard. Its fine particle size improves formation and printability without compromising runnability on high-speed paper machines.

SiO272.2%
Al2O313.7%
Whiteness96.6%
pH Value8.0
Oil Adsorption (g/g)0.468
Median Size (D50)4.571 μm
Particle Size400-1200 Mesh
Download Spec Sheet
UT-WASH Precision Kaolin

UT-WASH

A high-brightness, washed grade optimised for paper coating slurries. Its controlled particle size distribution delivers a smooth coating surface with excellent light scattering, improving print gloss and ink holdout.

SiO267.6%
Al2O316.8%
Whiteness94.1%
pH Value7.6
Oil Adsorption (g/g)0.511
Median Size (D50)4.233 μm
Particle Size600-1200 Mesh
Download Spec Sheet
UT-ULTRA Premium Calcined Kaolin

UT-ULTRA

Our upcoming fully calcined kaolin engineered for specialty thermal and inkjet papers requiring maximum brightness and precise pore-size control. Near-zero impurities ensure clean, consistent coating performance.

ProcessFull Calcination
Target WhitenessExtremely High
Target QualityMedical Grade Sterile
Impurity LevelNear Zero
Primary UseThermal & Inkjet Paper
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Factory direct pricing for local and international orders.

We will contact you back as soon as possible.

sales@darson.co.th
Nakhon Pathom, Thailand
Darson