R-gen® 919: Liquid Photoinitiator for Dark UV Inks | Overcoming Carbon Black Shielding & Curing Bottlenecks
In industrial inkjet printing, electronic marking, and premium packaging applications, achieving “deep and uniform black” in UV inks and coatings is a key quality requirement. However, excessive carbon black leads to poor light penetration, incomplete curing, surface tackiness, and adhesive residue, posing significant challenges to production yield and product quality.
Chitec’s R-gen® 919 liquid photoinitiator is specially engineered for dark and high-filler UV systems. Even under highly opaque carbon black conditions, it maintains outstanding UV-curing efficiency, effectively resolving the long-standing curing bottleneck faced by the industry.
Three Breakthrough Highlights to Overcome Dark Formulation Challenges
1. Fully Liquid Design – Solving Solubility Limitations of Traditional Photoinitiators
R-gen® 919 is fully miscible with most acrylic resins. Even in high-pigment, high-opacity formulations, it remains evenly dispersed, preventing sedimentation and printhead clogging issues.
2. Compatible with Arc and LED Light Sources – Curing Speed up to 10–20 m/min
R-gen® 919 initiates polymerization rapidly even in dark UV inks, making it ideal for high-speed PCB inkjet printing, precision electronic component marking, and high-efficiency automated production lines.
3. High Curing Efficiency with Virtually No Odor – Compliant with Global Regulations
R-gen® 919 contains no CMR 1(b) substances, making it suitable for high-safety markets and odor-sensitive applications.
Key Application Areas
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Black UV Inkjet
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UV Inks for PCB Marking
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High-Pigment UV Coatings
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Non-CMR UV Systems
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