Abstract: A reader card for use in densitometric test analysis wherein a film having data recorded as spots thereon is supported by and retained on a base card, the reader card further having an area for use in establishing initial conditions for the optical system of the densitometer and a series of borders for indicating the relative position of the film on the card to the optical system of the densitometer. In a preferred embodiment, the reader card includes a base card having an opening therethrough, and an overlay thereover. The overlay retains the film in place and includes a black band covering the film, the black band having windows therethrough for observing and measuring the spots.

Abstract: A combination shipping carton for photographic enlarger and print developing tray assembly wherein the shipping carton can be utilized to load the developing tray assembly in a light-tight environment after removal of the enlarger and developing tray from the shipping carton. The shipping carton includes a pair of telescopingly positioned open ended boxes forming an inner box and an outer box. The inner box includes, through the sidewall thereof, an access opening assembly which is connected to a light-tight sleeve assembly through which is to be conducted the user's hands in gaining access to the interior chamber of the inner box. The outer box includes a cut-out section which can be oriented with respect to the access opening assembly to gain access to the access opening assembly. The outer box can also be located in a different position on the inner box to cover the access opening assembly, which is the normal position during shipping.

Abstract: A light-tight, elongated, hollow tapered wall base to which a slide housing is movably connected. The slide housing includes a light source which produces a light beam which passes through a filter assembly and a lens assembly to the bottom of the base. A photographic transparency is to be mounted within a slide holder which in turn is movably located in a close fitting relationship within a slide receiving station. The slide receiving station is formed within the slide housing between the filter assembly and the lens assembly. Removably connected to the bottom of the base is a photographic print tray assembly. The photographic print tray assembly includes a focusing target. The image projected from the photographic transparency is to be observed on the focusing target by a view port which is formed within the base.