 Sadighi's portraits of Persian literature figures have grown popular as consolidated works, especially portraits of Abu-Ali Sina, Saadi and Ferdowsi.In order to portray Abu-Ali Sina's face, an expert group was formed in 1944 and designing the face was assigned to Sadighi.In May 1945, he designed a picture with a full face by a black pen and the picture was ratified at the 21st meeting of the National Works Board and it was printed on the Ibn-I Sina lottery papers.