Professional Color Solutions for Paper Manufacturing

Sunmun Technology provides advanced color paste systems engineered to meet the specific demands of paper production. We address key challenges in stock coloring, coating coloration, and paper whitening—delivering consistent color quality, process stability, and cost-effective performance.

Core Challenges in Paper Coloring

Stock (Internal) Coloring

• Foaming: Excessive foam affects process control and paper formation.
• Color Spotting: Uneven pigment dispersion causes visible specks or streaks.
• Particle Re-Coarsening: Instability leads to colorant agglomeration and quality defects.

Coating & Surface Coloring

• Material Flocculation: Destabilization causes coating defects and runnability issues.
• Sticking to Rolls: Improper formulation leads to build-up on application equipment.

Critical Performance Requirements

• Lightfastness & Weathering: Maintaining color integrity over time.
• Chemical/Solvent Resistance: Stability in diverse papermaking environments.
• Wash & Rub Fastness: Preventing color transfer or bleeding.

Our Engineered Solutions

High-Performance Color Paste Platform

Our formulations are designed for superior stability and seamless integration:

• Exceptional Stability: Excellent chemical, pH, and hard water resistance prevents flocculation and precipitation.
• Easy Process Integration: No settling, gelling, or graininess ensures smooth online addition.
• Strong Fiber Affinity: Pigments bond effectively with pulp fibers, eliminating migration and ensuring excellent fixation.
• Low-Foaming Design: Minimizes foam generation for uninterrupted production.

Specialized Whitening & Optical Solution

Our premium whitening paste enhances paper brightness sustainably:

• Superior Optical Performance: A narrow particle size distribution ensures high opacity and a clean blue-white shade.
• Batch-to-Batch Consistency: ∆E < 0.5 guarantees unmatched color uniformity.
• Reduced Optical Brightener Agent (OBA) Dependency: Significantly lowers OBA usage, improves visual whiteness, and delays paper yellowing.
• Excellent Dilution Stability: Maintains performance in process conditions.

The Sunmun Partnership Value

• Enhanced Production Efficiency: Reliable, low-foaming pastes with excellent runnability reduce downtime and waste.
• Superior End-Product Quality: Consistent color, high fastness properties, and excellent formation meet stringent quality standards.
• Cost & Environmental Benefits: Reduced OBA consumption, lower effluent treatment load (compatible with standard Fenton process), and optimized colorant usage lower total operating costs.
• Technical Collaboration: We work with your team to analyze specific pulp systems, chemistries, and process conditions to recommend or customize the optimal solution.