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UniCure LED-395 — UV LED Flexo Inks
Energy-saving curing under 395 nm LED lamps for narrow-web label presses, with no mercury and almost no heat.
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Overview
Formulated for long-wave light
LED arrays emit a narrow band, typically 385, 395 or 405 nm, at high irradiance with no short-wave UV and almost no infra-red. An ink formulated for a mercury-vapour lamp may not cure under LED at all.
UniCure LED-395 is formulated for long-wave light: initiators that absorb at 385–405 nm, and a surface-cure package that beats oxygen without the short-wave lines a mercury lamp provides.
Product data
| Peak wavelength | 395 nm (also available for 385 nm arrays) |
|---|---|
| Photoinitiators | BAPO, polymeric phosphine oxides and multifunctional acylphosphine derivatives |
| TPO | Not used. TPO was reclassified reprotoxic 1B under CLP in 2025 and is on the EuPIA Charter exclusion list |
| Surface cure | Amine synergists, or polymeric amine-free co-initiators in low-migration grades |
| Energy | A fraction of mercury-lamp electricity, no mercury, no ozone, almost no heat into the substrate |
White paper
Two very different light sources
A medium-pressure mercury lamp emits a broad spectrum from 200 to 450 nm with strong lines at 254, 313 and 365 nm, plus visible light and a great deal of infra-red. An LED array emits a narrow band at high irradiance with no short-wave UV.
The short-wave lines of the mercury lamp are what cure the surface of a conventional ink: they are absorbed in the top micrometre and overcome oxygen inhibition. LED light penetrates deeply and cures from the bottom up, so the surface is the last thing to cure and the first thing to be inhibited by oxygen. Without short-wave UV, surface cure depends on radical flux beating oxygen diffusion.
The right combination gives a tack-free, rub-resistant surface at production speed. The wrong one gives a print that is hard underneath and tacky on top — the classic LED failure.
Pigment competition is the second problem: yellow and white absorb or scatter near-UV strongly, so opaque white and dense black remain the limiting colours and set the lamp requirement.
Downloads
Technical documents
Download the Technical Data Sheet, Safety Data Sheet and Regulatory Summary for every product in this range. Technical data sheets are provided as standard for all Uniform Industries printing inks and coatings.
| Product | Description | Documents |
|---|---|---|
| UniCure LED 395 | UV LED flexo inks for 395 nm lamps | TDSSDSRegulatory |
TDS = Technical Data Sheet. SDS = Safety Data Sheet (MSDS) according to Regulation (EC) 1907/2006 Annex II and UN GHS. The Regulatory Summary lists the compliance status of each product. Click a document to read it online in the viewer; each document can also be downloaded as PDF (up to 5 downloads per location). Product catalogues are available to read online. For a controlled copy, a declaration of compliance for your specific application, or documents for a product not listed here, write to sales@ufindustries.com.
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Science Technology Innovation & Application. Printing inks and coatings for packaging, label and graphic printing since 2006.
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