Frequently Asked Questions

SD water-based ink is a type of printing ink that uses water as the primary solvent instead of organic solvents. It is environmentally friendly, low in VOC (volatile organic compounds), and widely used in packaging printing due to its excellent print quality and fast-drying properties.

The main difference lies in the solvent used. SD water-based inks use water as the carrier, making them more eco-friendly with lower VOC emissions. Solvent-based inks use organic solvents which are more harmful to the environment but often dry faster. SD water-based inks are becoming the preferred choice due to increasing environmental regulations.

Yes, our SD inner printing water-based inks meet international food contact safety standards. They comply with regulations such as EU 10/2011 and FDA requirements, making them suitable for direct food contact packaging applications.

SD water-based ink can be used on a wide range of substrates including BOPP, PE, PET, PP, paper, cardboard, and various plastic films. Different formulations are available for different material types to ensure optimal adhesion and print quality.

SD water-based inks are commonly used in gravure printing, flexographic printing, and screen printing processes. They are particularly well-suited for packaging printing applications where environmental compliance and print quality are critical.

The "oil-to-water" transformation refers to the industry-wide shift from solvent-based inks to SD water-based inks. This transition is driven by environmental regulations, health concerns, and sustainability goals. SD water-based inks offer comparable performance while being more eco-friendly.

SD water-based inks should be stored in a cool, dry place away from direct sunlight and extreme temperatures. The recommended storage temperature is between 5°C and 35°C. Containers should be kept tightly sealed when not in use to prevent evaporation and contamination.

The shelf life of SD water-based ink is typically 6-12 months when stored under proper conditions. Always check the expiration date on the product label and use the ink before that date for best performance.

SD water-based inks reduce VOC emissions by up to 90% compared to solvent-based inks, improving air quality and reducing environmental impact. They are also easier to clean up with water, reducing waste and disposal costs.

Yes, we offer professional color matching services for our SD water-based inks. Our color laboratory can create custom colors according to your Pantone color reference or physical sample. Please contact our technical support team for color matching requests.

Our SD-WP General Surface Printing Ink is specially formulated for BOPP films. It offers excellent adhesion, fast drying, and good printability on BOPP substrates. For higher scratch resistance requirements, we recommend SD-WH Scratch-resistant Surface Printing Ink.

For PE substrates, we recommend using our SD-WE PE Blown Film Surface Printing Ink. It is specifically designed for PE materials and provides excellent adhesion without blocking issues. Proper surface treatment or corona treatment can also enhance adhesion.

Our SD-NP Light Packaging Inner Printing Ink is ideal for general food packaging applications. For high-temperature sterilization requirements (121°C), we recommend SD-NH High-performance Retort Inner Printing Ink which meets strict food safety standards.

Yes, our SD-NQ and SD-NH retort inner printing inks are specifically designed for high-temperature retort applications. SD-NQ can withstand 100°C water boiling, while SD-NH is suitable for 121°C high-temperature sterilization processes.

SD water-based varnish is applied on top of printed surfaces to provide protection and enhance appearance (gloss, matte, etc.). Primer is applied before printing on difficult-to-adhere substrates to improve ink adhesion. Our SD-WV Varnish Series provides scratch resistance, while SD-WP Primer Series improves printability on films.

Our SD-WV Water-based Functional Varnish Series is specially formulated for scratch resistance. It provides excellent rub resistance and can significantly enhance the durability of printed products, making it ideal for packaging that requires frequent handling.

Poor adhesion can be caused by improper surface treatment, incorrect drying conditions, or ink-substrate mismatch. Solutions may include surface pretreatment (corona treatment), adjusting drying temperature, or selecting a different SD ink formulation. Our technical team can analyze your specific situation and provide targeted solutions.

We provide comprehensive technical support including product selection guidance, printing process optimization, on-site troubleshooting, and training programs. Our technical team has extensive experience helping customers transition from solvent-based to SD water-based inks.

For domestic deliveries within mainland China, we partner with major logistics providers including SF Express, JD Logistics, YTO Express, ZTO Express, and EMS. Depending on your location and delivery requirements, we can provide standard, expedited, or same-day delivery options.

Domestic delivery times vary by location: 1-2 days for major cities (Beijing, Shanghai, Guangzhou, Shenzhen), 2-3 days for provincial capitals, and 3-5 days for remote areas. Expedited services are available for urgent orders.

Yes, we provide international shipping to over 100 countries worldwide. We work with reliable freight forwarders and shipping companies including DHL, FedEx, UPS, and Maersk for sea freight. We can handle both air freight and sea freight according to your requirements.

International delivery times depend on the destination and shipping method: Air freight typically takes 3-7 business days, while sea freight takes 15-45 days depending on the port of destination. Express services (DHL, FedEx, UPS) usually deliver within 3-5 business days worldwide.

We can provide DDP (Delivered Duty Paid) service where we handle all customs clearance procedures and pay duties on your behalf, or DAP (Delivered at Place) where the buyer handles customs clearance. Please indicate your preference when placing an order.

Required documents include commercial invoice, packing list, bill of lading/air waybill, and certificate of origin. For certain products or destinations, additional documents such as phytosanitary certificates or import licenses may be required. We will provide all necessary documentation for your shipment.

Yes, we provide tracking numbers for all shipments. Once your order is dispatched, we will send you the tracking information via email. You can track your package through the logistics provider's website or our customer portal.

For bulk orders, we offer discounted shipping rates and can arrange full container load (FCL) or less than container load (LCL) shipments. We can also provide warehouse-to-warehouse delivery services. Contact our sales team for a customized shipping quote based on your order volume and destination.

SD surface printing inks achieve high color density with excellent saturation. Our standard CMYK colors typically reach density values of: Cyan ≥1.40, Magenta ≥1.35, Yellow ≥1.20, Black ≥1.80 on standard PE substrates. This ensures vibrant and consistent print results.

SD-NH High-performance Retort Ink is specifically formulated for 121°C autoclave sterilization. After sterilization at 121°C for 30 minutes, it maintains excellent adhesion (≥4.0N/15mm), no blocking, no migration, and stable color fastness. It meets medical-grade sterilization requirements and is ideal for prepared dishes and medical packaging.

The recommended drying temperature for SD water-based inks is typically 60-80°C for the drying tunnel. For high-speed production lines (150-350m/min), we recommend slightly higher temperatures around 70-90°C. Proper drying ensures good adhesion and prevents blocking issues.

SD inner printing inks excel in shallow dot reproduction. Our SD-NP General Inner Printing Ink can reproduce independent dots as small as 2μm, ensuring clear and sharp small text and fine patterns. This is crucial for high-quality packaging printing with intricate designs.

Yes, SD-WE PE Special Ink features excellent anti-blocking properties. It remains stable even at 40°C/80%RH for 24 hours without blocking or sticking. This makes it ideal for shopping bag production and storage in humid environments.

For food packaging applications, SD inner printing inks achieve lamination strength ≥3.5N/15mm for dry lamination and solventless lamination. Our premium SD-NH ink maintains ≥4.0N/15mm even after retort sterilization, ensuring packaging integrity throughout the supply chain.

SD-WF Pearl Film Ink is specially formulated for PP pearl films. It provides excellent adhesion and compatibility with hot stamping and lamination processes. The ink maintains color stability for over 3 years indoors without yellowing, making it ideal for festive decorations and premium gift packaging.

Yes, SD-NA PP Tape Ink is specifically designed for tape applications. It can withstand hot melt coating at 150-180°C without blistering, discoloration, or adhesion loss. The ink also passes 50°C/30min water boiling test, ensuring durability in various conditions.

The standard viscosity range for SD water-based inks is 20-30 seconds (#4 Zahn cup). This can be adjusted based on printing speed and substrate type. Our technical team can provide customized viscosity recommendations for your specific printing conditions.

SD water-based inks maintain excellent batch consistency with ΔE ≤1.5 for standard colors. We use strict quality control measures including automated color matching systems and raw material traceability. If you notice color variations, our technical team can provide color adjustment guidance.

For frozen food packaging applications, we recommend SD-NQ Retort/Frozen Ink for -18°C standard freezing and SD-NH High-performance Ink for -30°C deep freezing. Both inks maintain excellent flexibility and adhesion after prolonged freezing, preventing ink cracking or peeling. SD-NH can withstand 121°C retort sterilization followed by -30°C storage without performance degradation.

SD water-based inks exhibit excellent low-temperature resistance. Our standard SD-NQ ink maintains flexibility down to -18°C for 6 months without cracking. The premium SD-NH ink extends this capability to -30°C for 12 months, suitable for deep-frozen seafood and medical products requiring ultra-low temperature storage. All our frozen food grade inks pass rigorous freeze-thaw cycle tests.