Color cathode ray tube having color sorting mask including cut portions

A color cathode ray tube comprising:

• an envelope including a rectangular panel having a major axis and a minor axis perpendicular to each other;
• a phosphor screen located on the inner surface of the panel;
• an electron gun assembly which emits electron beams toward the phosphor screen;
• and
• a color sorting mechanism opposed to the phosphor screen,
• the color sorting mechanism including a mask body, having a rectangular effective portion with a large number of electron beam holes and a skirt portion bent from the periphery of the effective portion and extending along a tube axis perpendicular to the major and minor axes, and a mask frame having an inner wall fixedly fitted with the skirt portion of the mask body,
• the skirt portion including cut portions,
• the width of the cut portions along the minor or major axis ranging from 0.10×L to 0.45×L, where L is the distance from an end of the minor or major axis to a diagonal end, and the height of the cut portions along the tube axis being equal to 5% to 40% of the height of the skirt portion along the tube axis in a region near the minor or major axis.