Dye Stain
Basic Yellow 40
1. Select an application method.
Tray immersion: Submerge item in Basic Yellow 40 reagent for 5 seconds.
Aerosol sprayer: Evenly apply Basic Yellow 40 dye stain to item with aerosol sprayer and leave for 5 seconds.
2. Rinse item with water via squirt bottle or gently running stream for 10 seconds.
3. Ridges will develop a yellow color and can be captured using 1:1 photography.
4. View ridge development using a UV lamp at 365nm with UV protection googles, or using a forensic light source in the 450 – 485nm range with yellow googles.
5. Capture ridge detail using 1:1 photography and a yellow colored or 515 (BP 35) bandpass filter.
View under
365nm or
450 - 485nm
Goggles / Filter
Clear UV or Yellow
Development Color
Yellow
REFERENCES
Arrowhead Forensics. (2021). Basic Yellow 40: Product Description. Retrieved from https://www.arrowheadforensics.com/a-26501-basic-yellow-40.html
Chesapeake Bay Division, International Association for Identification. (2010). Latent Fingerprint Processing Techniques – Selection & Sequencing Guide. “Basic Yellow 40”. Retrieved from https://www.cbdiai.org/basic-yellow-40.html
Sirchie. (2011). Technical Information: Basic Yellow Fluorescent Enhancement Dye. Retrieved from https://www.sirchie.com/media/resourcecenter/item/l/v/lv507_ti02-77eng-rev5e_1.pdf