Table 3. Surface energy for the seven pigments as well as their corresponding polar and dispersion components.

Pigment	γ d sa /mN m–1	γ p sa /mN m–1	γ sa/mN m–1
PR	21.5	5.4	26.9 ± 0.3
PO	36.2	12.0	48.2 ± 0.7
PY	20.2	0.2	20.4 ± 0.3
PG	27.2	2.0	29.2 ± 0.3
PB	25.1	2.0	27.1 ± 0.2
PI	34.0	3.6	37.6 ± 0.4
PV	36.0	2.7	38.7 ± 0.4