Ragnar Sandberg (1902-1972) is one of the leading figures of Swedish 20th-century art, and his oil paintings command high prices today. Sandberg belonged to the so-called Gothenburg colorists. Through his sublime palette that fleetingly alternated between color expressionism and pale pastel tones, he created a special position for himself among his contemporaries. At the time of the end of the Second World War, Sandberg increasingly devoted time to studies in the smaller format and became interested in the rhythmicity and lawfulness of the forms. In 1947 he became a member of the Academy of Arts. In the same year, he received the title of professor of drawing at the Academy of Arts, a position he maintained until 1949 when he was appointed professor of painting at the said institution.

"- In the suite with blue studded glass, Sandberg develops a sensitivity to the compressed still life format and a restraint in color that we have rarely seen before in his production. Gone are the attempts at the complex color chords, taken from Bonnard's palette. Instead, the work develops with form echoes and shifts in the perspective. A number of small and large ovals together build up the triangular glass forms. Light and dark create a dramatic clear sky which in a baroque still life and the blue-black basic chord of the painting gives the feeling of a coloristic cleansing bath. Sandberg's great interest in the rhythm of shadows also comes into play here his right in a less elaborate way than in many other paintings. He shows that good painting must be based on a confidence to express itself in image, independent of the ideological superstructure. The painting speaks to us without words."