The purpose of this project was to find new methods to relax and flatten tracing paper supports for works of art. Gore-Tex® barrier was used to achieve an even and gentle relaxation without any risk to water-sensitive colors. Flattening was carried out on the suction table. This procedure allows severe undulations from tracing papers to be removed with minimal stress. Even highly water-sensitive colors were not endangered nor were the dimensions of the tracing papers enlarged. -- AATA