The viscosity of our field samples was much higher than that of some previously measured labgenerated BBOA and BBOA proxies. Therefore, any BBOA studies using lab-generated aerosols as proxies for wildfire BBOA should be mindful of these differences. It is, however, useful to be able to make samples in the lab rather than collecting them in the field as it enables more extensive studies of BBOA behaviour. Experiments as a function of aging, dilution, combustion conditions, and fuel types should be done to bridge the gap between lab and field BBOA and to develop methods for creating more realistic BBOA in the laboratory environment.