Sunscreen SPF Testing in Skincare OEM: Proving Protection With Real Measurements

SPF is a measurement, not a marketing number. Sunscreen protection is verified through standardized testing that measures how much UV the formula blocks. An OEM uses in-vivo and in-vitro methods, plus photostability and broad-spectrum checks, to prove a sunscreen delivers the protection its label promises.

The Scenario: Three challenges in SPF testing

SPF testing faces three challenges:

Pain Points

• The SPF number must reflect real, measurable protection, not an estimate;
• Broad-spectrum protection against UVA and UVB must both be verified;
• The formula must stay photostable so protection lasts, not degrade in the sun.

The Solution: Three SPF solutions

SPF testing offers three solutions:

1. Standardized SPF measurement Measure SPF through standardized in-vivo and in-vitro methods.

2. Broad-spectrum verification Verify protection across both UVA and UVB ranges.

3. Photostability testing Confirm the formula stays stable and protective under UV exposure.

The Result: Protection you can prove

With these tests, the sunscreen's protection is proven, not promised. SPF testing is what turns a formula into a trustworthy product.