The aim of the study was to develop a simple reproducible and reliable in vitro water
resistance (WR) method to assess the sun care products. This paper is the result of a …

While sun protection factor (SPF) and UVA protection are the most important determinants of
a cosmetic sunscreen product, water resistance is the third important feature. The C olipa in …

A new laboratory in vitro method for the measurement of sunscreen water resistance uses
spectrophotometric analysis of a model skin substitute before and after 80-minute …

A novel in vitro technique has been used to assess the water resistance of topical
sunscreens. The technique is based upon transmission spectrometry using excised human …

Background/purpose: Sunscreen products today represent a trend of providing not only
simple sun protection factor (SPF)/protection of UVA (PFA) but also other additional benefits …

Objective Water resistance retention (WRR) is the third performance attribute of sunscreens.
Today, the standardized method for testing WRR is performed in vivo. For screening …

Substantivity of sunscreen formulations is affected by the wash‐out rate of ultraviolet‐
absorber and‐reflector compounds in water. Water‐resistance of sunscreen formulations is …

The aim of this work was to develop an in vitro method for testing the water resistance of sun
products. For comparison, we used the in vivo method put forward by the Colipa. Standards …

Objectives The water resistance of sunscreen products has taken more importance for the
UV protection of consumers involved in water activities and sports. The present work …

Water resistance of sun protection products has been found to be best determined by the
following methods:(1) Tests for determining UVL filter adherence to merino wool; this gives a …