Influence of distance between dot pattern and braille in tactile graphics by emboss printing method on the ease of braille identification

Tactile graphics containing only dots have long been widely used. However, tactile may be mistaken for braille. This study aimed to investigate the influence of distance between dot pattern and braille in by emboss printing method on ease identification. Test pieces with varied were created using EDEL software, which is a de facto standard Japan, printed ESA721 printer (JTR Co.). Sighted subjects who beginner readers visual impairment expert asked identify test pieces. The results showed that visually impaired regularly use charts could accurately, quickly, confidence when vertical horizontal 4.7 mm or greater. For novice readers, they able confidently was 5.9 greater These indicate can correctly, In addition, extended distances easier than those distances.