Fig. 4. The gross appearance of wound healing on day 18 (a–d) and 21 (e–h). (a and e) Wounds treated with 0.1 mL of paraffin oil (control); (b and f) wounds treated with 0.1 mL of oleogel (1% w/v); (c and g) 0.1 mL oleogel (2% w/v)-treated rats showing almost complete wound closure, and (d and h) 0.1 mL composite gel (1% w/v)-treated showing complete wound closure. Progress of wound healing with exact scale bar is given in Fig. S7a–d.†.