Kodak 4 x 12" #2B Pale Yellow Optical Wratten 2 Filter is an industry-standard filter that just got better. With the same spectral response and color as current Wratten Gelatin Filters, Kodak Wratten 2 Optical Filters offer several improvements.
The #2B absorbs ultraviolet radiation. This weak yellow filter is used when a #2A doesn't provide enough in black and white photography. Should more contrast be desired, try a higher grade filter such as 2B, 9, 12 or 15.
Wratten 2 Improvements
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