Thin metallic sheet for shadow mask

Thin metallic sheet for shadow mask comprising:

• a Fe-Ni alloy sheet having Fe and Ni as major elements;
• degrees of planes on a surface of said alloy sheet, the degree of {111} plane being 5% or less, the degree of {100} plane being 50 to 93%, the degree of {110} being 24% or less, the degree of {311} plane being 1 to 10%, the degree of {331} plane being 1 to 14%, the degree of {210} plane being 1 to 10%, the degree of {211} plane being 1 to 10%, each of said degrees of planes being calculated by means of dividing a relative X-ray intensity ratio of each of (111), (100), (110), (311), (331), (210) and (211) diffraction planes by a sum of relative X-ray intensity ratios of said diffraction planes;
• and
• a ratio of degrees of planes which is [{100}+{311}+{210}]/[{110}+{111}+{331}+{211}] being 0.8 to 20.

An improved shadow mask wherein the improvement comprises making the mask from a thin metallic sheet comprising:

• a Fe-Ni alloy sheet having Fe and Ni as major elements;
• said alloy sheet having degrees of planes on a surface, the degree of {331} plane being 14% or less, the degree of {210} plane being 10% or less and the degree of {211} plane being 10% or less, each of said degrees of planes being calculated by means of dividing a relative X-ray intensity ratio of each of (331), (210) and (211) diffraction planes by a sum of relative X-ray intensity ratios of (111), (200), (220), (311), (331), (420) and (422) diffraction planes;
• and
• a ratio of degrees of planes, which is {210}/[{331}+{211}] being 0.2 to 1.