Three sites (5.0 cm 9 5.0 cm) were designated on the volar
forearm of each arm (Fig. 1). Facial masks were weighed (500 mg)
and spread over each site. The homogeneous film thickness was
adjusted to 1 mm. After 20 min on the skin, the dry film was
washed off. Oil-in-water emulsions were weighed and delivered in
drops onto each site using a syringe. The same procedure was
applied to this formulation. Table I shows the experimental design
(sites of application, topical formulations and numbers of volunteers)
of the short-term treatment study.