The bamboo cut and ink dipped writing is Iran's traditional calligraphy which results in diversity and geometric symmetry in the structure of the letters. The traditional calligraphy is used by contemporary Iranian poster designers and shows a new calligraphy style in font design different from other nations in poster design, which reflects the following artistic features: Firstly, compact and smooth shape of letters; Secondly, shaped fit and outstanding personality of letters; Thirdly, three-dimensional shape of letters.