65 The Holy Cross retable side effects of staining and discolouration. Every tested consolidant caused discolouration. The decision for MFC was taken, as the discolouration could be reduced by subsequent surface treatment with acetone. During consolidation, a lot of collected detached flakes could be reassembled and refixed to the wooden surface. As the wooden surface had shrunk in transversal direction, several areas of lifted paint layer did not have enough space for total flattening and consolidation. In some cases of uniform colour areas, it was decided to sacrifice tiny amounts by precise cuts, thus managing flattening and consolidation. In those areas where paint layer was found stable but lifting in a closed “bulb”, a nearly invisible permanent facing with japanese paper stripes and Ethylcellulose ET 200 was added to reinforce the overall stability. These areas will require regular monitoring. (Fig. 95, 96) Fig. 96: Strips of Japanese paper over bulged area Fig. 95: Applying one strip of the facing
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