It all begins with the set-up. Diffused window light, and a large A2 curved white sheet of paper as back drop. Another sheet to fill in the shadows.
Expose as far too the right without clipping. After that PP in LR and finally editing in PSE Elements. The latter used for masking and different blend modes,to achieve the final effect. Basicly I desaturated most of the colours and painted some back using masks. Hope this helps.