The Instituto de Cultura Puertorriqueña [Puerto Rican Cultural Institute] granted Lorenzo Homar a one year European sabbatical to study from mid-1967 to mid-1968. It was an enriching experience for Homar, allowing him to visit many museums and meet other printmakers and calligraphers. While in London he invited Torres Martinó to join him.Lorenzo Homar (San Juan, 1913–2004) was a printmaker, poster artist, calligrapher, book illustrator, set and clothing designer, and mentor to a whole generation of Puerto Rican printmakers. From 1952 to 1957, he was the director of the Taller de Gráfica [Graphics Workshop] at the División de Educación de la Comunidad (DIVEDCO). In 1955, he organized the Taller de Gráfica at the Instituto de Cultura Puertorriqueña (ICP), where he remained until 1973. Later, he worked in his own studio, where he experimented with and perfected the silkscreen technique.José A. Torres Martinó (Ponce, born 1916) is considered the ideological leader of the generation born in the 1950s in Puerto Rico. As such, he was among those who defended the creation of an autonomous artistic movement in Puerto Rico. He also played an active role as arts educator and promoter of the graphic arts. In 1969, he founded and taught at the Taller de Diseño Gráfico [Graphic Design Workshop] de la Escuela de Arquitectura de la Universidad de Puerto Rico. Working with the artist Myrna Báez, he founded the Hermandad de Artistas Gráficos de Puerto Rico in 1981. The reason for organizing this group of artists was to protest against government intervention in cultural matters at the time.