| 摘要 |
PURPOSE:To provide a high transmittance so that flares are decreased and contrast is improved by constituting a diffusion layer and two tinting agent layers in the form of separate layers and disposing the two tinting agent layers on both sides of the diffusion layer. CONSTITUTION:The two tinting agent layers 2 are disposed on both sides of the diffusion layer 1 and these layers are formed as separate layers. The diffusion layer 1 is formed by adding an inorg. or org. diffusing agent such as Al2O3, SiO2, Al(OH)3 or CaCO3 into an acrylic resin, polycarbonate resin or vinyl chloride resin which is a base material. The tinting agent layers 2 are formed by adding oil soluble dyes or org. pigments, etc., of an azo system, anthraquinone system, etc., to the similar base material and coloring the same to gray or black system. The transmission type screen which has the high light transmittance, decreases the flares and has the good contrast is thereby easily obtd.
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