Name: Kaolin for Paper
Brand: Darson

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

Kaolin platelets creating a smooth printing surface

Performance Characteristics

92%

Whiteness (L*)

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

400-600

Mesh Size

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

Low

Abrasion

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

Our Product Solutions for Paper

Standard Grade

UT-CLAY Series

Cost-effective filler grade. Excellent for adding bulk and opacity to newsprint and cardboard.

SiO₂48.5%

Al₂O₃36.0%

Whiteness> 85%

Particle Size200-400 Mesh

Download Spec Sheet

RECOMMENDED

High Grade

UT-WHITE Series

High whiteness with fine particle size. Perfect for demanding applications like ceramics and paper coating.

SiO₂48.5%

Al₂O₃36.0%

Whiteness> 85%

Particle Size400-600 Mesh

Download Spec Sheet

Premium Grade

UT-ULTRA Series

Calcined kaolin for specialty thermal papers requiring maximum brightness and porosity control.

SiO₂48.5%

Al₂O₃36.0%

Whiteness> 92%

Particle Size400-600 Mesh

Download Spec Sheet

Frequently Asked Questions

How does kaolin improve printability?

Kaolin particles fill the valleys between paper fibers, creating a smoother surface. This allows ink to sit on top (better holdout) rather than soaking in, resulting in sharper text and more vibrant colors.

Can Darson kaolin be used for both filler and coating?

Yes. Our Standard Grade (UT-CLAY Series) is excellent as a wet-end filler to reduce pulp costs. Our High Grade (UT-WHITE Series) is refined for surface coating applications where gloss and smoothness are critical.

What is the abrasion level of your kaolin?

Our kaolin is naturally soft and processed to remove grit (silica). This results in low abrasion, which significantly extends the life of your paper machine wires and cutting blades.

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Factory direct pricing for local and international orders.

DARSON CO., LTD
Kampaengsaen, Nakhon Pathom, Thailand