INX Digital is dedicated to the development of UV inks and proudly commits to formulating future products without the use of TPO (Triphenylphosphine Oxide), underscoring our commitment to environmental sustainability and meeting evolving industry standards.

Introduction, what is TPO?
‍All energy curable inks, including UVCurable, use a component called photo-initiator to trigger the reaction of curing, transforming a liquid into a solid film; such reaction is the polymerization. There are many photo-initiators, but the ink-jet inks manufacturing industry uses TPO for the majority of the times. INX Digital is no exception. TPO typically refers to “Triphenylphosphine Oxide,” which is a photoinitiator. Photoinitiators like TPO play a crucial role in the curing process of the ink when exposed to UV light, initiating the reaction that transforms the liquid ink into a solid coating. However, it comes with some toxicological concern.
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Health concerns related to TPO
‍TPO went through an analytical consideration by European authorities for quite some time during the past few years, and a decision was made recently for a reclassification, due to increased toxicity concerns. The European Chemicals Agency’s new legislation recommends classifying TPO as Reprotoxic 1B, reflecting potential harm to fertility and the unborn child. Already classified in the USA and some Asian countries, the process is happening in Europe, where TPO now requires additional safety concern exposures (on Safety Data Sheets), like mentioning that TPO is enlisted in the SVHC list (Substance of Very High Concern) from REACH.

‍EuPIA and Exclusion Policy
‍INX Europe Ltd is an associate member of EuPIA, and a voluntary signee of the declaration of honoring compliance with the Exclusion Policy. The Exclusion Policy applies to all types of printing inks, applied in all types of printing processes, including inkjet, and for all end use applications, and citing from the EuPIA website, “has been an important code protecting the health and safety of workers in the ink and printing industries, as well as the end users of printed materials. In 1996 the European sector group of the printing ink industry took over existing national stewardship initiatives to create the Exclusion List for Printing Inks and Related Products. It applied stricter rules to the manufacture and marketing of inks than the existing legal regulations would have required. In taking this responsibility, the European ink industry took a proactive lead for the world.INX Digital, as a division of INX Europe Ltd, will be fully compliant with this policy.
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‍TPO in EuPIA Exclusion Policy List
‍With this reclassification taking place, TPO has been enlisted in the EuPIA Exclusion Policy List of restricted materials, and all members who have voluntarily signed for being compliant, need to remove this component from their formulations.INX Digital is now extensively working to remove TPO from all formulations, including ink-jet inks. All UVCurable inks will undergo a reformulation for being safer and healthier for workers and end users.