Invisible Ink Viewing Invisible inks include UV dyes, OBA's, OPAS etc. To view these inks when printed you will need the addition of a UV ( Blacklight ) strobe. Used in conjunction with standard strobe lighting you will be able to view the invisible dye in register with the standard print. The right of the image shows standard lighting, the left of the image shows the use of a UV strobe on the same substrate. This ensures perfect registration of the invisible dye in processes such as forms and security print applications.