Fig. 9: Graphs illustrate the average mass gain (mg) of soot deposited on glass slides during soot drum experiments.
From: The reproduction of fire-born soot for comparative cleaning tests on heritage objects

Group A (A1, A2, A3 on the X-axis): the result of three repeated sooting experiments, in which each experiment three glass slides were exposed to combustion for 30 min; Group B (B1, B2, B3 on the X-axis): the result of three sooting experiments with incremental exposure time (20−60 min) to combustion. For each experiment, the mass of three glass slides were measured and the standard derivation are shown in the error bar.