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To compare the various restorative measurements under competitive environment simulation, may become a major challenge to the concepts to preserve the pieces of the world heritage. Test the ability of the protective measurement before putting it into practice. The primary effects as e. g. a cover, a refreshing of the colour, or an improved light reflection can lead to a disaster if the active acting world of microbes gets support by that action. The way out is to implement test-systems in advance, able to judge the protective measurement under different defined conditions simultaneously.