Ruth Schloss was born in 1922 in Germany. She made Aliyah to Israel in 1937. From 1938-42, she studied at the Bezalel Art Academy in Jerusalem with Mordechai Ardon. In 1942 she joined the pioneer group at Kibbutz Merhavia and later she joined Kibbutz Lehavot Habashan where she was a member until 1953.
In 1946 she participated in Hakibbutz Haartzi painting course, directed by Yohanan Simon and Marcel Janco. In 1947 she had her first group exhibition at the Mikra Studio in Tel Aviv.
She also worked as an illustrator of children's books for “sifriat Hapoalim” between the years 1947 to 1949. Later she studied in Paris at the Grande Chaumière Academy (1949-51) and returned to Israel in 1952.
Schloss painted in a studio in Jaffa from 1963 to 1983 and since then she paints in her home at Kfar Shmaryahu.

Ruth Schloss' paintings have always been an active reaction to the burdensome reality surrounding her, which led her towards a daring social-political stance, resolutely adopting a standpoint against social injustice. Since 1993, Schloss began exploring the condition and status of old age, along with the other subjects that have always inspired her artistic activities. For some time Schloss visited a relative living in a Home for the Elderly, where she began drawing scenes depicting the distress she saw around her. Thus, a new and impressive series of paintings was born, which in the course of time was developed and enlarged. The paintings depict the distress of daily events, as were perceived by the artist, resulting in expressive creations. Some of the paintings have been already exhibited in the year 2000, as part of a group exhibition held at the Jerusalem Artists' House entitled The Third Color. In the course of 1998, Ruth Schloss created a series of small, intimate works using acrylic paints on film paper. She continued to develop the topic of old age - capturing basic situations, moments and scenes representing human beings treading the path to the end of their earthly existence. In her paintings, she conveys man's loneliness and the body's betrayal – a human body that tires and wears out. Schloss' creations confront the artist, as well as the viewer, with their inevitable, universal fate.