Shadow mask for colour crt and method of fabricating the same

A shadow mask for a color CRT is made of an Re-Ni series alloy, preferably consisting of 35 # 38% Ni, 0.1 # 1.0% Mn. 0.05 # 0.5% Cr, 0.05 # 0.01% B, below 0.02% C, 0.001 # 8.0% Co, 0.001 # 0.01% N, below 0.008% O, below 0.1% of at least one of Ti, Er, Mo, V, Nb, Be, P, and the balance of Fe by weight, and has a {100} cube orientation crystal plane concentration of 15 # 35% and an average grain size of 3 # 15Ám. The method of making the shadow mask includes the steps of hot rolling and annealing a slab of Fe-Ni alloy, obtained either by melting in a converter or an electric furnace and casting into an ingot and rolling, or by continuous casting, cold rolling the plate so formed for a first time and annealing for a first time, cold rolling for a second time and annealing for a second time, temper rolling and annealing to obtain a thin plate having a 15 # 35% concentration of a {100} crystal planes, with a 3 # 15Ám average grain size, applying a coat of photoresist, exposing and developing the photoresist, etching the thin plate, and shaping the thin plate and coating it with black iron oxide.