Quick Answer:
Short Answer
Infrared for high-contrast, white light for low-contrast patterns, UV for fluorescent inks.
Light source selection depends on your application:
- Infrared (880 nm): Best for most high-contrast applications including black lines on white, coating edges, and foil substrates. Works for both edge guiding and line guiding with the same sensor.
- White Light: Required for low-contrast patterns, subtle color differences, and applications where infrared cannot distinguish the feature.
- UV (385 nm): Required when the line is printed with UV-fluorescent ink that is invisible under normal lighting.
Contact Roll-2-Roll Technologies to discuss your specific material and line characteristics.