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High Quality Security Ink Offset UV Invisible for Security Paper, Colorless to Grass Green Show Color Under The UV Lamp, 1kg/Can. UV Invisible Security Feature: Colorless to grass green under UV lamp for security paper applications. Professional R&D Support: Own R&D department with 2 engineers and 16-year industry experience. OEM/ODM Services Available: Full OEM and ODM services provided for custom printing solutions. Fast Delivery Time: Delivery within 3-7 working days for standard orders. Eco-Friendly Formulation: Developed high-quality eco-friendly soy offset printing ink. One-Stop Purchasing: Comprehensive technical support and one-stop purchasing solutions.