Sandbox:Sara: Difference between revisions

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|style="padding: 5px 5px; background: #DCDCDC; font-weight: bold" |'''Definition'''
|style="padding: 5px 5px; background: #DCDCDC; font-weight: bold" |'''Definition'''
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* Minimal erythema dose (MED) of UVB radiation causing erythema after applying 2 mg/cm2 of sunscreen to skin divided by the dose producing 1 MED on unprotected skin
*[[Minimum|Minimal]] [[erythema]] [[dose]] ([[MED]]) of [[UVB radiation]] [[Causes|causing]] [[erythema]] after [[Applicability Domain|applying]] 2 mg/cm2 of [[sunscreen]] to [[skin]] [[Division (biology)|divided]] by the [[dose]] [[Product (biology)|producing]] 1 [[MED]] on unprotected [[skin]]
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* The dose of UVA causing observable pigment darkening (minimal pigment dose [MPD]) after applying 2 mg/cm2 of sunscreen to skin divided by the dose producing 1 MPD on unprotected skin
* The dose of UVA causing observable pigment darkening (minimal pigment dose [MPD]) after applying 2 mg/cm2 of sunscreen to skin divided by the dose producing 1 MPD on unprotected skin
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|style="padding: 5px 5px; background: #DCDCDC; font-weight: bold" |'''[[Development|Developed]] for'''
|style="padding: 5px 5px; background: #DCDCDC; font-weight: bold" |'''[[Development|Developed]] for'''
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* Sunscreens
*[[Sunscreens]]
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* Sunscreens  
* Sunscreens  
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|style="padding: 5px 5px; background: #DCDCDC; font-weight: bold" |'''[[Ultraviolet|UV]] [[wavelengths]] [[Protected health information|protected]]'''
|style="padding: 5px 5px; background: #DCDCDC; font-weight: bold" |'''[[Ultraviolet|UV]] [[wavelengths]] [[Protected health information|protected]]'''
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* UVB  
*[[UVB radiation|UVB]]
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* UVA  
* UVA  
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|style="padding: 5px 5px; background: #DCDCDC; font-weight: bold" |'''[[Example 1|Examples]]'''
|style="padding: 5px 5px; background: #DCDCDC; font-weight: bold" |'''[[Example 1|Examples]]'''
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* SPF 2 protects against 50% of UVB
*[[SPF]] 2 [[Protecting group|protects]] against 50% of [[UVB radiation|UVB]]
* SPF 8 protects against 88% of UVB
*[[SPF]] 8 [[Protecting group|protects]] against 88% of [[UVB radiation|UVB]]
* SPF 15 protects against  93% of UVB
*[[SPF]] 15 [[Protecting group|protects]] against  93% of [[UVB radiation|UVB]]
* SPF 30 protects against 97% of UVB
*[[SPF]] 30 [[Protecting group|protects]] against 97% of [[UVB radiation|UVB]]
* SPF 50 protects against 98% of UVB
*[[SPF]] 50 [[Protecting group|protects]] against 98% of [[UVB radiation|UVB]]
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* UVA‐PF1 protects against 20–39% of UVA
* UVA‐PF1 protects against 20–39% of UVA

Revision as of 18:07, 1 August 2019



Measurement of UV protection afforded by sunscreens and clothing
Measurement system SPF (Sun protection factor) UVA‐PF (UVA‐protection factor) UPF (Ultraviolet protection factor)
Definition
  • The dose of UVA causing observable pigment darkening (minimal pigment dose [MPD]) after applying 2 mg/cm2 of sunscreen to skin divided by the dose producing 1 MPD on unprotected skin
  • The ability of fabrics to prevent UV radiation transmission via absorption and/or reflection and highly dependent on fabric type, color, porosity, thickness, weight, and other factors
Developed for
  • Sunscreens
  • Clothing
Global acceptance
  • International
  • United States only
  • International
UV wavelengths protected
  • UVA
  • UVA, UVB
Examples
  • UVA‐PF1 protects against 20–39% of UVA
  • UVA‐PF2 protects against 40–69% of UVA
  • UVA‐PF3 protects against 70–95% of UVA
  • UVA‐PF4 protects against >95% of UVA
  • UPF cotton 5–10
  • UPF denim 1700

Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief: Sara Mohsin, M.D.[2]





References

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