Color picture tube

A color picture tube for which a light-weight support frame for holding a shadow mask can be used and whose weight can be reduced, and a color picture tube that can be provided without requiring the use of a press mold, and a press machine for producing a shadow mask. The tension applied to the shadow mask is 5-90% of the tension (full tension) that would be applied to the shadow mask to prevent electron beams from arriving at a position that is shifted from a predetermined arrival position on the phosphor screen surface due to the thermal expansion of the shadow mask caused by absorbing thermal energy that is converted from the energy of electron beams when electron beams strike the shadow mask.