Fig. 2

Examples of pictograms based on the Rainbow Code of Biodeterioration for cultural heritage objects consisting of a single color. A—stone; B—metal; C—glass; D—clay; E—Bones and other materials of animal origin; F—Fabric; G—Wood and other materials of plant origin; H—Painting materials; I—Museum collection; J—Underwater cultural heritage objects. Since the museum can contain exhibits made of any type of material, which corresponds to the entire color range, to simplify the designation, a special pictogram of white color (according to the white light, obtained by mixing all the lights of the rainbow) is introduced. Also, since cultural heritage objects made of any materials can be located underwater, and the aquatic environment differs significantly in its characteristics, an additional ultramarine-colored pictogram is introduced