In this context, I would like to point out the following: the infrared investigation the
study (IRR-Osiris A1) took place in the Herzog Anton Ulrich-Museum, Braunschweig.
The responsible curators stated: there were no preparation sketches at all. Jan
Davidsz. De Heem developed and changed his compositions directly on the canvas
during the painting process. By looking the infrared illustration, it was possible to
recognize the applied practice afterwards as well as to bring forward the following
evidence: In depth technical study- Artist - Jan Davidsz. De Heem techniques and
brushwork - Flemish Baroque art.
