Fig 4. Subjective rating results of the changes from initial time point T0 to final time point T2 of the bentonite, barite and DC experiment after six weeks.

All values represent the average over all subjective ratings. Ratings range from 1 (no change) to 5 (strong change). Analogues to the color scale of the Hyperspectral Viewer, yellow is T0.5 (directly after exposure), red is T1 (two weeks after exposure) and green is T2 (six weeks after exposure). The titles of the subgraphs are the concentrations in mg ⋅ L⁻¹ of the exposure depicted as the row title.