ABSTRACT
A modi‘cation of the behind-the-knee (BTK) protocol has been utilized to evaluate lotion transfer from emollientcoated menstrual pads and pantiliners. The BTK protocol
using the popliteal fossa as a test site was originally developed to evaluate both the inherent chemical irritation, and the potential for mechanical irritation of substrates and products that come into prolonged or repeated contact with the skin (9). However, we have found that this method effectively measures the amount of lotion formulations that transfer to the skin with greater consistency and reliability than measurements conducted in the course of clinical in-use studies (10). When coupled with evaluations for skin effects, the visual bene‘ts from lotioned absorbent products can be demonstrated.
