PURPOSE: To prevent dazzling and electrification on the surface of a cathode ray tube(CRT) and improve image contrast by making an antistatic film on the surface of the CRT as a colored film containing coloring matter absorbing light in corresponding wavelength band.
CONSTITUTION: For a laminated substance that an antistatic film is provided on a transparent support, the antistatic film contains coloring matter which has maximum absorption wavelengths in a range of 560mm-610mm. As the coloring matter contained in the antistatic film, cation group coloring matter is preferable, especially rhodamine group coloring matter. The rhodamine group coloring matter is refered to structured material as shown in formula [I]. Such a laminated substance is used for the CRT of a television set, etc., to improve image contrast.
MITSUHASHI KAZUO