Determination of the critical wavelength

Critical wavelength determination analysis is used to evaluate the effectiveness of UV filters in sunscreen products.

The critical wavelength (CWL) is measured by UV spectrophotometry to determine the protection spectrum.

It allows the “broad spectrum” character to be established according to regulatory criteria (e.g. ISO 24443).

At YesWeLab , we collaborate with a rigorously selected network of laboratories, most of which are certified and/or accredited (ISO 17025, COFRAC, etc.). These laboratories are chosen based on your specific needs, the matrices to be analyzed, and the analytical techniques or methods required.
If you have any specific requirements, please do not hesitate to specify them when submitting your request: our scientific team makes every effort to respond accurately and responsively.
Since 2020, many manufacturers, distributors, and design offices have trusted us to manage their analyses, entrusting us with their samples via our digital platform.
To find out more or submit a specific need, contact our team now.