SPF Testing

Related keywords

Sandblasting to Improve the Reproducibility of In vitro Sunscreen Evaluation

Mar 20, 2014Sébastien Miksa, Dominique Lutz and Céline Guy, HelioScreen Labs, Creil, France

SPF test results from substrates treated using a traditional sandblasting technique are compared with those from substrates treated using a new process. Based on the topographic control of 10 batches and 34 sunscreen evaluations, the authors concluded the new process had better topographic reproducibility, consequently improving the SPF repeatability and reproducibility in vitro.

Influence of Pressure During Spreading on UV Transmission Results

Nov 1, 2013Sébastien Miksa, Dominique Lutz and Céline Guy, HelioScreen Labs

This work evaluates the impact of applied pressure during sample spreading on the in vitro measurement of UV transmission. The authors work in a range of pressures between 50–200 g and demonstrate that pressure control is a key parameter that should be strictly controlled to ensure the reliability of test results.

In Vitro UV Testing—Robot vs. Human Spreading for Repeatable, Reproducible Results

Oct 1, 2013Sébastien Miksa, Dominique Lutz and Céline Guy, HelioScreen Labs

Repeatability and reproducibility are crucial to validate any test method. In order to master these criteria, the authors developed an automated spreading device and compared it with human spreading. Application of the device in eight laboratories and using 36 sunscreens revealed great improvements via automated spreading, ensuring good intra- and inter-laboratory variability.