No Cracking in Low Temperatures | Sanqi International HC-7 Water-Based Varnish — The Bend-Resistant Protective Varnish for Footwear & Apparel Printing

In cold autumn and winter conditions, footwear and apparel prints are most prone to cracking, delamination, peeling, and flaking — issues that seriously compromise product quality and shipment pass rates. To address the industry's pain points with low-temperature printing, Sanqi International's HC-7 Water-Based Varnish is purpose-built for screen printing and spray coating on shoe materials and garments, delivering an all-in-one solution that combines low-temperature bend resistance, strong adhesion, anti-yellowing and heat resistance, and premium texture.
Superior Low-Temperature Bend Resistance — No Cracking in Autumn & Winter
HC-7 delivers outstanding low-temperature flexibility. At -20°C, it withstands over 60,000 stable bending cycles without cracking or delamination, and at room temperature, it endures up to 100,000 bending cycles.
Ideal for high-stretch and low-temperature applications such as athletic shoes, elastic fabrics, yoga wear, and wetsuits, its print coating remains flexible and rugged — impervious to repeated bending and low-temperature embrittlement.
High Tensile Strength & Strong Adhesion — Prints Stay Put Through Washing & Abrasion
With a tensile strength of over 3.5KG, HC-7 exhibits exceptional adhesion to a wide range of shoe materials and fabrics.
After undergoing washing, abrasion, and pull tests, the print resists edge lifting, film peeling, and detachment — significantly extending the service life of printed footwear and apparel products.
Anti-Yellowing, Heat-Resistant & Hydrolysis-Resistant — Built for Complex Production Processes
With an anti-yellowing rating of Level 4 and above, it effectively resists sun-induced oxidation, staying free of yellowing and aging over long-term use.
It withstands hot pressing at 150°C and features excellent hydrolysis resistance, ensuring stable, damage-free performance during downstream processing — fully compatible with end-to-end factory production workflows.
Fine Finish with High Gloss — Elevating Print Quality
With fineness controlled below 15μm, the cured film is smooth, even, and free of particles or pinholes.
Boasting a gloss level of 50–70 degrees, the varnish delivers a transparent, high-shine, full-bodied finish after application, effectively enhancing the overall aesthetic appeal of the product.
Stable Application & Eco-Friendly — Ideal for Large-Scale Mass Production
With a viscosity of 40,000–50,000 and a solid content of 42–45%, HC-7 applies evenly via screen printing or spray coating, offering excellent leveling, ease of operation, and high yield rates.
Its pure water-based eco-friendly formula features low VOC emissions, meeting modern green factory production standards.
Whether for athletic shoe material printing, elastic garment production, or outdoor apparel processing, Sanqi International's HC-7 Water-Based Varnish effectively solves common issues such as low-temperature cracking, peeling, yellowing, and poor durability — making it the preferred high-stability, high-performance protective varnish for the footwear and apparel printing industry.