Fig. 4From: The artists’ materials of P. S. Krøyer: An analytical study of the artist’s paintings and tube colours by Raman, SEM–EDS and HPLC Left canvas stamp from Kultorvets Farvehandel (F. E. Kühle) on the back of the portrait of Christoffer. Right label from Kultorvets Farvehandel (H. Averhoff) on the stretcher used for the portrait of DrachmannBack to article page