The purpose of the study is to compare the 3 ointment formulations containing LEO 29102 plus calcipotriol and Daivonex® ointment and Diprosone® ointment and to compare LEO 29102 plus calcipotriol to LEO 29102 alone and to calcipotriol alone in the same ointment vehicle, using the psoriasis plaque test modified from the method developed by KJ Dumas and JR Scholtz.