[1] She and her sister Ana, who went by the name of Anita Blanch, both had interest in the theater and arrived in Mexico in the 1920s.

[3] She and her sister formed the Compañía de Teatro Anita Blanch (Anita Blanch Theater Company), hiring artists like Angel Garasa, Rafael Banquells, and Jose Cibrian, among others.

In the 1940s, they produced plays like “No hables mal de os gitanos” by Enrique Bohorques; “La mujer legitima” by Xavier Villaurrutia; “Doña hormiga” by Alvarez Quintero; “El amor las vuelve locas” by Enrique Suarez, and many other productions.

[4] Isabelita also had her own touring company, Compañía de Isabelita Blanch, which in 1940 made the inaugural performance in the restored Teatro Principal de Puebla, oldest theater in Mexico, with the presentation of the work "Quién te quiere a ti".

[6][7] Blanch also performed in several movies including “Luponini de Chicago” (1935) by Jose Bohr, “Casa de mujeres”[4] and "La historia de siete pecadoras"[1] (1942) by Gabriel Soria and “Con la música por dentro" (1946) by Gómez Landero,[4] and "Los secretos del sexo débil"[1] (1960).