Subject of this gallery exhibition is the examination of six masks from New Ireland and the curatorial and conservational analysis of two examples. The scientific measures leading to such a conservation project are like an expedition in which with the decoding of the used materials and their processing the cultural historic context and the material basis of the object are determined. On this basis, the conservation strategy is specified. The visitor is invited to follow the criminological investigation of conservators and scientists to decode hidden secrets of the objects together. Questions may be: what are the mysterious eyes of the masks made off and what is a turbo petholatus?