Is SEMITECH silica compliant with food contact regulations?

Yes, Semitech provides high-purity (SiO2 ≥ 99.8%) fumed silica and aqueous dispersions specifically optimized for safety and compliance in global food packaging ink applications.

Fumed Silica for Printing Inks - SEMITECH | Silica & Conductive Powder Solutions

Q: How does fumed silica improve pigment loading in packaging inks?

Fumed silica creates a nano-scale structural network that stabilizes pigments, preventing flooding and sedimentation. This allows for high pigment loading without compromising storage stability.

Shanghai Semitech New Material Co., Ltd.
1628 Lijing Road, Lingang New Area, 200000, Shanghai, China.

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Email:
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Ignite Your Printing Ink Innovation

In the competitive packaging and digital markets, ink performance is defined by precision and durability. Semitech® provides high-purity fumed silica for printing inks and high-performance matting agents, ensuring optimal pigment loading, substrate wetting, and rheology control across water-based, solvent-based, and UV-curable systems.

Innovative Solutions for Packaging & Digital Inks

UV-Curable Printing Inks

Enhance curing efficiency and scratch resistance. Our silica serves as a high-efficiency reactive diluent stabilizer, providing excellent flow and dimensional stability in radiation-cured systems.

Gloss & Surface Control

Our matting agent solutions offer exceptional transparency and matting efficiency. Ideal for thin-film packaging inks where aesthetics meet food contact compliance.

Digital & Inkjet Printing

Prevent nozzle clogging and pigment sedimentation. Achieve high pigment loading and superior air occlusion prevention for flawless digital printing results.

Food Contact Compliance

Meet today’s stringent global requirements. Our specialized aqueous dispersions of silica are alkaline-optimized for safety and exceptional performance in food packaging.

Recommended Semitech® Grades

GMATT® T100

Outstanding matting efficiency and high transparency. Equivalent to thermal silica standards.

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SEMISIL® R272

Versatile hydrophobic fumed silica for solvent-borne and UV ink systems.

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SEMISIL® R274

Aqueous dispersion for water-based ink wetting and anti-settling tasks.

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FAQ: Printing Ink Formulation Solutions

Q1: How does fumed silica improve pigment loading in packaging inks?

A: Fumed silica creates a nano-scale structural network that physically suspends pigments, preventing flooding and sedimentation even at high concentrations. By providing precise rheology control, fumed silica for printing inks allows formulators to maximize pigment loading for deeper colors while maintaining perfect shelf stability and consistent viscosity.

Q2: What is the optimal matting agent for ultra-thin UV-ink films?

A: A fine-particle, surface-treated silica like Semitech® ST-TS100 is ideal for thin films, providing maximum matting efficiency without increasing viscosity. Due to its optimized particle size distribution, it ensures a smooth surface finish and rapid curing speed, which are critical for high-speed UV packaging lines.

Q3: Can fumed silica prevent nozzle clogging in digital inkjet printing?

A: Yes, fumed silica acts as a micro-spacer and anti-settling agent that keeps pigment particles in a state of stable suspension. This prevents the formation of hard "cakes" during printer idle time, fundamentally reducing the risk of nozzle clogging and ensuring consistent jetting performance in industrial inkjet heads.

Q4: Is SEMITECH® silica compliant with global food contact regulations?

A: Yes, our specialized hydrophilic fumed silica (purity ≥ 99.8%) and alkaline aqueous dispersions are fully compliant with major food contact safety standards. They are specifically recommended for indirect food packaging, providing an inert, safe solution for high-performance barrier inks.

Q5: How do you achieve the best rheology control in solvent-borne gravure inks?

A: Using hydrophobic fumed silica (like SEMISIL R272) provides the necessary thixotropy to prevent misting and ensures clean dot reproduction. The hydrophobic surface treatment ensures compatibility with non-polar solvent systems, preventing viscosity drift during the long-run printing process.

Q7: Does fumed silica help with air occlusion in high-speed printing?

A: Fumed silica significantly reduces air occlusion by optimizing the surface tension and internal structure of the ink. This ensures that air bubbles are not trapped during high-speed circulation, preventing "pinholes" and ensuring a flawless, continuous ink film on the substrate.