In 1957, some twenty-five years after the end of the war, Rosen pursued his dream and together with his wife Selma and daughter Lynndy came to London, where he trained at the prestigious Central School of Arts and Crafts, today The Central St Martins.

In his preface to the exhibition brochure for his 35-year retrospective exhibition entitled ‘The Romantic Revival’ held in Los Angeles, California, USA, in 1975, Rosen writes:

‘After having studied at the Central School of Art, I became a painter-etcher. This medium encouraged the fascinating incorporation of a wide variety of textures, setting in train persistent experimentation. Printing multiple editions from copper plates is fundamental to the etching process. However, I felt that manufacturing repetitive editions lay in the domain of the master craftsmen, whose interest was in qualitative expertise, and that constant imagination and inventiveness should be the prime function of the creative artist. So, I printed only one impression, then changed the form and colour of the copper plate, cutting it up in thematic variations until it’s destruction. These mono-print and then coloured etchings developed into mixed-media paintings on paper and then on canvas, adapting etching techniques to oil painting, enriching the overall effect. A series of abstract expressionist works in oil followed, enhancing the range of textures and the effects of inter-active colour fields.’