The Kodak 100 x 100mm #102 Yellow-Green Filter converts a barrier-layer photocell response, often found in densitometers, to an even-luminosity response as seen by the human eye.

Wratten 2 filters are constructed from gelatin for ease of use and consistent performance. When compared to original Wratten filters, Wratten 2 filters are more rigid and durable, easier to handle, and less sensitive to humidity, static cling, and fingerprints.