Scratch off printing

When sourcing scratch-off products, you must prioritize ink opacity and scratchability. The scratch-off layer should be 100% opaque to ensure the underlying data (like PINs or QR codes) is not visible under strong light. Additionally, specify the base material weight; for cards, a minimum of 300gsm art paper or 0.76mm PVC is standard to prevent bending. Ensure the supplier uses a UV overprint varnish between the variable data and the scratch ink to protect the information from being accidentally erased.

Security is paramount for lottery tickets or gift cards. You should require the supplier to provide a Data Encryption Protocol for transferring your codes. Ask if the factory has CCTV monitoring in the printing and packaging areas. It is highly recommended to choose suppliers who offer randomized data generation and can provide a data integrity report to confirm no duplicate codes were printed.

For products entering the US or EU, the scratch-off ink must be non-toxic and lead-free. Request EN71-3 or REACH certification to ensure the metallic pigments do not contain harmful heavy metals. If the product is intended for children (e.g., educational scratch cards), it must comply with CPSIA standards. Always verify that the supplier uses FSC-certified paper if your brand has sustainability requirements.

Scratch-off printing is widely used for promotional lottery tickets, prepaid telecom cards, security labels, and educational tools. Customization options include custom shapes for the scratch area, multi-color overprinting on top of the silver/gold scratch layer, and integrated QR codes for O2O (Online to Offline) marketing. For high-end applications, consider hot stamping scratch-off foils which provide a cleaner finish than traditional silk-screened ink.

To prevent fraud, request a 'Light-Proof Test' during the sampling stage. High-quality suppliers on Made-in-China.com use a black carbon layer or a dense grey sandwich layer within the paper to block high-intensity light. You should also specify a security pattern (fine guilloche lines) to be printed behind the scratch area, making it impossible to read the code without removing the ink.

Focus your negotiation on yield rates and waste management. Since variable data printing can have errors, negotiate a guaranteed 99.9% accuracy rate. For large volumes (e.g., >100,000 units), ask for tiered pricing where the unit cost decreases significantly as the setup costs for silk-screen frames are amortized. Always insist on a pre-production sample that includes the actual variable data logic you intend to use.

Scratch-off inks can be sensitive to extreme heat and humidity, which may cause the ink to harden and become 'un-scratchable.' Ensure the shipping terms include moisture-proof packaging (vacuum sealing or silica gel packets). For transaction security, use Secured Trading services on Made-in-China.com to ensure payment is only released after you have verified the scratch-off functionality and data accuracy through a third-party inspection.

Be aware of Anti-Dumping Duties on certain paper products in regions like the EU or USA. Check the HS Code (typically 4911.99) for your specific country's tariff rate. When shipping to the US, ensure the ISF (Importer Security Filing) is done correctly to avoid customs delays. For small batches of promotional cards, Air Freight is recommended to minimize the time the ink spends in uncontrolled maritime environments.