Special Features:

Used to reduce light intensity across the visible spectrum without altering the spectral profile; manufactured by dissolving colloidal carbon with specialized dyes in a gelatin materialto achieve a desired neutral density performance; the gelatin liquid and dyecombination is then coated onto a supportive substrate until it has dried; after removal from the substrate the film is coated with lacquer for protection

Properties:

A light filter which reduces the intensity of the light without changing the relative spectral distribution of the energy.