Page 3 - Solumbra Catalog 2025

Solumbra fabrics offer

Full Spectrum

Mid-day Tropical Sun Protection

%

100

(Percentage with no perceptible
sunburn (erythema) in 3 hours
of tropical sunlight)

Solumbra

Solumbra fabrics offer full spectrum sunlight protection from sunburn and suntan,
not just broad spectrum UVB/UVA lab protection.

Broad spectrum sunscreens are good at filtering UVB and some UVA in the lab.
That’s why they have high SPF claims.

The SPF Test • Each sunscreen area had six protected sub-sites, The SPF 100+ sunscreen and Solumbra fabric results
The indoor SPF test is the accepted UV protection which were covered in sequence based upon are consistent with those obtained in SPF tests done
test that measures a sunscreen’s ability to delay UV cumulative UVB exposure—45 minutes to about in non-tropical mid-day sunlight, except that it took
induced erythema/sunburn or redness. The test is 3 hours. more time/sun exposure to achieve comparable
done on human backs with sunscreens applied at • These test results would typically be used to doses of sunlight and results.
2 mg/cm over at least a 30 cm area. A trained calculate an SPF number. In this case, the results
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evaluator scores both the protected and unprotected are used to calculate a percentage of occurrence
skin sites for perceptible redness with defined borders of erythema/sunburn or redness at a given
between 16 hours and 24 hours after exposure. cumulative UV exposure and exposure time.
Solumbra vs Sunscreen The Results:
These results are from a 50 person SPF test carried • 94% of the SPF 100 sunscreen sites were graded
out in almost three hours of mid-day sun in Peru over perceptible to moderate sunburn/erythema after
several days. 2 hours and 100% after almost 3 hours.
Test Procedure: • 89% of the SPF 50 sunscreen with “Innovative”
• Five leading broad-spectrum, SPF 100 Sunscreens ingredients were graded perceptible to moderate
(150 test sites). sunburn/erythema after 2 hours and 89% after
almost 3 hours.
• Two leading SPF 50 “Innovative” ingredient
European Sunscreens (34 test sites). • 0% of the Solumbra fabric protected sites (n=2136)
were graded perceptible or higher erythema after
• Solumbra fabrics from actual Solumbra shirts 3 hours of sun exposure. Therefore, 100% were
(2136 test sites). graded less than or no perceptible erythema.
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