In-line monitoring of printing processes in an offset printing press by NIR spectroscopy: Correlation between the conversion and the content of extractable acrylate in UV-cured printing inks

- NIR reflection spectroscopy was used for process control in printing technology.
- The acrylate migration depends linearly on the conversion.
- Acrylate migration can be estimated from conversion data.
- Conversion and migration were monitored in-line at an offset printing press.
- Prediction errors were 5% for the conversion and 0.03 mg dm−2 for the migration.