Testing liquids used in this study and their properties: viscosity (η), surface tension (γ) and density.

Liquid	Water [wt%]	Glycerin [wt%]	Hexanediol [wt%]	Dye [wt%]	Viscosity η [mPa s]	Surface tension γ [mN m−1]	Density ρ [kg m−3]
High (↑) η–low (↓) γ	41.9	48	10	0.1	7.2	27.5	1.12
Low (↓) η–low (↓) γ	64.9	25	10	0.1	3	26.8	1.06
High (↑) η–high (↑) γ	42.4	57.5	0	0.1	7.99	67.6	1.14
Low (↓) η–high (↑) γ	74.9	25	0	0.1	1.7	70.5	1.06
Center (⊗) η–center (⊗) γ	53.4	45	1.5	0.1	4.23	43.5	1.12