In the digital printing industry, ink serves as an invisible bond that carries creativity and value. High-quality DTF ink ensures vivid, durable designs that are resistant to fading and cracking. Every batch of Hanrun Paper DTF ink undergoes a rigorous quality inspection process to guarantee vibrant colors, smooth printing performance, strong adhesion, and exceptional durability. With a meticulous quality control system, Hanrun Paper DTF ink consistently delivers stable performance and outstanding print results, empowering customers to achieve excellence in their printing projects with confidence.

Hanrun Paper DTF Ink Quality Inspection Process

Physicochemical Parameter Testing

pH Value Testing: Maintaining appropriate pH levels is critical for the stability and performance of DTF ink.

Viscosity Testing: Viscosity affects ink flow and print quality.

Solid Content Testing: Solid content impacts color intensity and durability.

Density Testing: A 1.00–2.00 mL sample is measured using an acid burette and weighed on a precision balance (1 mg accuracy).

Particle Size Testing: Particle size influences inkjet performance and print quality. Data analysis reveals flow characteristics and compatibility with printer nozzles.

Hue, Color Difference (ΔE), and Color Density Testing: Standard and sample inks (cyan, magenta, yellow, black) are printed on pre-approved substrates. After drying, LAB values are measured using a spectrophotometer to calculate ΔE, ensuring precise color accuracy.

Surface Tension Testing: Surface tension affects ink wetting and spreading on media, ensuring strong adhesion and uniform printing.

Conductivity Testing: Conductivity is measured using a conductivity meter after heating the sample to 30°C, as it directly impacts inkjet performance.

Foam Suppression Testing: Ink samples are diluted and shaken vigorously for 15 seconds, and foam height is recorded immediately and after 30 seconds of rest. The average foam height is calculated to evaluate defoaming efficiency.

Stability Testing: Ink performance is assessed under various storage conditions to ensure long-term usability.

Performance Parameter Testing

Drying Performance Testing: Evaluates drying time and quality post-printing. Fast-drying inks enhance productivity, while thorough drying ensures adhesion and color fastness.

Abrasion Resistance Testing: Printed samples are subjected to friction using standardized tools. High abrasion resistance is vital for products requiring frequent surface contact.

Heat Resistance Testing: Printed samples are exposed to 200°C for 2 minutes. Post-test LAB values are measured, and ΔE is calculated to assess color stability.

Lightfastness Testing: Samples are UV-exposed for 48 hours. Color retention is evaluated by comparing exposed and unexposed LAB values via ΔE, which is crucial for products exposed to sunlight or artificial light.

Clarity Testing: The Sharpness and definition of printed images/text are inspected to ensure professional-quality output.

Color Density Testing: Measures ink density to verify consistent and accurate color reproduction. Premium DTF ink maintains stable density for vibrant, true-to-life prints.

Conclusion

Hanrun Paper’s relentless pursuit of DTF ink quality extends beyond stringent inspections—it reflects our commitment to accountability for every user. We understand that choosing Hanrun Paper DTF ink signifies trust, which drives us to continuously refine our processes and elevate product standards. Our DTF ink is certified by OEKO-TEX® and GOST international standards, adhering to EU benchmarks for eco-friendliness, safety, and stability. These certifications reinforce its role as a reliable barrier in DTF printing production.

By selecting Hanrun Paper DTF ink, you choose a product synonymous with high quality, consistency, and peace of mind—ensuring exceptional print experiences and outstanding results.