Abstract: A color picture tube in which at least one of phosphor layers emitting green, blue and red lights which are deposited on the inner surface of a glass panel contains a black light-absorbing material.

Abstract: A color cathode ray tube having color phosphor element strips spaced from each other by intervening light absorbing areas (black strips) which comprises an envelope; a faceplate; a phosphor screen formed on the inner wall of the faceplate; an electron gun unit so arranged in the neck portion of said cathode ray tube envelope as to emit in-line plural electron beams; and a slit-shaped aperture mask facing the faceplate, wherein the multicolor phosphor screen consists of a plurality of groups each consisting of several color phosphor element strips spaced from each other by a plurality of intervening light absorbing strips; and there is disposed adjacent to said color phosphor element strips a slit-shaped aperture mask perforated with a plurality of beam passing holes.

Abstract: In the manufacture of a color cathode ray tube equipped with an in-line electron gun for emitting a central electron beam and a pair of side electron beams, the inner surface of a face plate is exposed to make a stripe screen through a shadow mask using a light source and a correction lens. At an exposing stage corresponding to the central beam and at exposing stages corresponding to the pair of side beams a correction lens is commonly used. Relative azimuth of the correction lens between the exposing stage corresponding to the central beam and the exposing stages corresponding to the side beams is different by an angle of 90.degree..