DISCLAIMER: Acid Yellow 7 should only be used on non-porous surfaces. It should never be used on paper, bed sheets, upholstery, or any other absorbent surfaces. Test a small area on surface to be stained prior to enhancement of print. 

1. The prints or footwear impression must be set with a 2% solution of 5-sulphosalicylic acid prior to application or a fixative must be included in the solution to prevent loss of detail. 

2. Select an application method. 

Tray immersion: Submerge item in Acid Yellow 7 solution for 1 minute.

Spray application: Spray Acid Yellow 7 solution onto item until coated.

3. Rinse with water or Acid Yellow 7 Rinse/Destain and allow the item to air dry. 

4. Ridges will develop a yellow color and can be captured using 1:1 photography. 

5. Lift the print with a white gelatin lifter.

6. View the print using a forensic light source in the 400 – 490nm range with yellow goggles.

7. Capture ridge detail using 1:1 photography and a yellow colored filter.