Caption: Figure 1: SEM photograph of (a) the upper surface, (b) lower surface, and (c) cross section of a hydrocolloid dressing; (d) the upper surface, (e) lower surface, and (f) cross section of hydrocolloid with a foam layer dressing; (g) the upper surface, (h) lower surface, and (I) cross section of a
calcium alginate dressing; (j) the upper surface, (k) lower surface, and (l) cross section of a calcium sodium alginate dressing; (m) the upper surface, (n) lower surface, and (o) cross section of foam with a polyurethane film layer dressing; (p) the upper surface, (q) lower surface, and (r) cross section of foam with a hydrogel and polyurethane film layer dressing.