The 3 x 3" #99 Dark Green Wratten 2 Optical Gel Filter from Kodak is a filter used to boost contrast in black and white photography. It is similar to a #61 green with an added #16 green factor.
Wratten 2 Improvements
More rigid/durable
Easier to handle
Color consistent today, and 6 months from now as well
Wratten 2 Optical Filters are less sensitive to humidity, less prone to static cling
Most Kodak gelatin filters are available in 3 x 3" (75 x 75mm), 4 x 4" (100 x 100mm), 6 x 6" (150 x 150mm), and 14 x 18" (350 x 450mm).
UPC: 041771322717