A comprehensive technical study of Ferdinand Hodler’s painting technique is currently being carried out at the Swiss Institute for Art Research. Between eighty and one hundred paintings are being studied in depth, using stereo-microscopy, ultraviolet fluorescence, infrared reflectography, x-ray, and transmitted light for structural analyses; EDXRF, polarizing microscopy, and FTIR for materials analyses. In addition, contemporary published records on Hodler’s workshop practice are evaluated. The study has already provided new insights into Hodler’s workshop practice after 1890, such as the use of special tools and techniques for the transfer of outlines, and other characteristics of his painting technique, including evidence of his use of Raffaelli Solid Colours. This paper presents work in progress; further results will become available during the course of the project. -- SCMRE