Forensic Blue Swabs are individually wrapped, single-dose applicators. This convenient method dispenses O-Toluidine Blue Dye used to aid in the identification of abrasion injury. In response to a need in forensic nursing practice, the Forensic Blue Swab was created to rid your exam room of the messy bottles of Toluidine Blue Dye (TBD) that get spilled and most of the time disposed of before you can use even half of the bottle. The Forensic Blue Swabs consist of a soft foam tipped swab that contains 1% Toluidine Blue Dye Aqueous Solution. Unscrew the swab from the container and the foam tipped swab is pre soaked and ready for your application.