1. Select an application method.
Tray immersion: Submerge item in R.A.Y. solution for 5 seconds.
Spray application: Evenly spray R.A.Y. solution with a squirt bottle or aerosol sprayer onto item and leave for 5 seconds.
2. Allow item to air dry.
3. Ridges will develop an orange color and can be captured using 1:1 photography.
4. View ridge development using a laser or forensic light source in the 450 – 550nm range using orange or red colored glasses.
5. Capture ridge detail using 1:1 photography and an orange or red colored barrier filter.
REFERENCES
Chesapeake Bay Division International Association of Identification. (2009). “R.A.Y.”. Retrieved from https://www.cbdiai.org/ray.html