(under subclass 38) Subject matter wherein an arrangement is provided for measuring an optical density of toner.
(1) Note. The optical density is the negative logarithm of the percent transmittance (or reflectance) or a transparent material (or opaque). For example, photos:graphic transmission, photos:graphic reflection, visual transmission of a material, etc.
SEE OR SEARCH CLASS
356, Optics: Measuring and Testing, for optical measuring and testing, per se.
