Disclosed is a method for manufacturing a visibility improvement sheet that comprises light absorbing portions having a substantially rectangular cross-section and can realize a high contrast while maintaining a view angle. The visibility improvement sheet is manufactured by forming light transparent portions juxtaposed to each other at predetermined intervals to form grooves having a substantially rectangular cross section juxtaposed to each other between the light transparent portions, filling the grooves with an ink composition comprising a transparent ionizing radiation curable resin composition and colored fine particles, and curing the ink composition in such a state that fine air bubbles are randomly dispersed in the filled ink composition.
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