As global carbon reduction and VOC emission standards become increasingly stringent, water‑based ink is rapidly replacing traditional solvent‑based ink, becoming the new mainstream for flexible packaging and high‑end industrial films. With years of experience in rotogravure printing machines, HSING WEI shares the advantages, implementation challenges, and applications of water‑based inks on rotogravure presses.

1｜What is Water‑Based Gravure Ink?

Water‑based ink uses water as the primary solvent, combined with resin emulsions and additives, and emits minimal harmful solvents during evaporation. Compared to traditional solvent‑based inks, it significantly reduces VOC levels in the workplace and cuts down on explosion‑proofing and emission treatment costs.

2｜Six Advantages of Water‑Based Inks in Rotogravure Printing

• Low VOC Emissions — Complies with regulations, reduces investment in activated carbon towers or RTO.
• Safe Production Environment — Lower flammable gas concentrations reduce worker exposure risks.
• Food‑Grade Potential — Meets regulations for food, medical, and infant packaging.
• Color Stability — Transparent resin films offer rich and layered color expression.
• Reduced Static Electricity — Water molecules help minimize static build‑up, preventing sparks and dust adhesion.
• ESG Branding Boost — Helps customers obtain eco‑labels and sustainability ratings.

3｜Five Key Aspects to Check Before Implementation

4｜Comparison: Water‑Based vs. Solvent‑Based Ink

5｜Common Key Notes for Water‑Based Ink Implementation

➊ Impact on Printing Speed

• Slight speed reduction during testing: Initially lower the line speed to validate the drying curve and curing.
• High‑speed recovery after optimization: Most lines can recover to 90% of solvent ink speed after extending ovens and upgrading hot air/IR modules; optimized airflow may support full speed.
• Conditions for safe acceleration: Must meet drying, residual levels, and oven outlet temperature standards simultaneously.

➋ Suitable Substrates

• BOPP, PET, Paper: Surface energy ≥ 38 dyn and uniform treatment ensure good adhesion.
• Coated Films (PVDC, EVOH, etc.): Polar coatings bond well with water‑based resins, providing vibrant color.
• Stretchable Films (PVC, OPS): Watch for expansion/contraction differences; use closed‑loop tension control and annealing zones for stress adjustment.
• Pre‑production testing: Use dyne pens or surface tension fluids and conduct 24 h adhesion aging tests.

➌ Cleaning Procedure Considerations

• Routine Cleaning: Use warm or mildly alkaline water to rinse ink tanks and doctor blades—no need for high‑VOC solvents.
• Periodic Deep Cleaning: Use neutral detergent with ultrasonic circulation to remove resin residue and extend part life.
• Safety & Environmental Benefits: Reduces organic solvent use, lowers hazardous waste costs, improves workplace safety and employee health.

Main Printing Equipment Provided by HSING WEI

• Rotogravure Printing Machine — Multicolor, high‑precision presses supporting AI closed‑loop register and rapid color change.
• Proofing Machine — Compact gravure proofing unit for real‑time cylinder engraving checks and production tension simulation.
• Laminating Machine — Dry/wet lamination and functional coating lines for various flexible packaging and industrial film materials.
• Slitting Machine — High‑speed, high‑precision slitters for BOPP, PET, CPP, PVC, and paper‑based substrates.

HSING WEI's Core Strengths

• One‑Stop Integrated Line — From gravure printing to slitting, all in‑house built, eliminating multi‑brand coordination costs.
• Precision Tension & Register Control — Closed‑loop tension, humidity‑temperature, and servo sync systems for handling film and ink shrinkage/stretching.
• Cross‑Industry Success Cases — Proven production in automotive, 3C, flexible packaging, outdoor, and home industries.
• Global Service & Fast Spare Parts — Multi‑national technical teams and remote diagnostics, ensuring minimal downtime.
• Ongoing R&D & ESG Strategy — 40+ years manufacturing, 70+ countries served, focusing on low VOC and energy‑saving technologies.

Want to implement water‑based ink successfully on your rotogravure line?
Email sales@hsingwei.com for a customized assessment and proofing service!