Testing liquids used in this study and their properties: viscosity, surface tension and polarity.

Liquids	Viscosity [mPa s]	Surface tension [mN m−1]	dD	dP	dH
Water	1.004	72.4	15.5	16	42.3
80% water/20% glycerin	1.6	65	15.9	15.6	39.3
80% water/20% glycol	1.7	71	15.8	15	39.4
50% water/40% glycerin/10% hexanediol	6.2	27.3	16.36	13.2	33.74
60% water/30% glycerin/4% hexanediol/6% diacetone alcohol	3.45	33.2	16.1	13.75	42.9
Dye ink yellow	6.3	37	—	—	—
Dye ink magenta	6.3	35	—	—	—
Pigment ink yellow	6.3	36.9	15.8	13.8	35.6
Pigment ink magenta	6.3	37.4	15.8	13.8	35.6
Latex pigment ink yellow	5	32.8	15.8	13.8	35.6
Latex pigment ink magenta	5.3	33.4	15.8	13.8	35.6