Technical Insights

Sourcing BP-9 for Flexo Inks: Quenching Risks Solved

Chemical Structure of UV Absorber BP-9 (CAS: 76656-36-5) for Sourcing Bp-9 For High-Speed Waterborne Flexo Inks: Photoinitiator Quenching RisksIn high-speed waterborne flexographic printing, the choice of UV absorber can make or break your curing efficiency. Sulisobenzone Sodium, commonly known as BP-9 or Disodium Benzophenone Sulfonate, is a water soluble UV absorber prized for its broad-spectrum protection. However, formulators often encounter a critical challenge: photoinitiator quenching. This phenomenon, where the UV absorber competes with the photoinitiator for UV energy, can lead to incomplete curing, tacky surfaces, and compromised print quality. At NINGBO INNO PHARMCHEM CO.,LTD., we understand these pain points and offer a drop-in replacement that matches the performance of leading brands while ensuring supply chain reliability and cost-efficiency.