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Tue May 16, 2006 10:48 pm  |
| what is la roche posay Aqualait? I think i am leaning to get the fluid XL from their line..but there are so many choices...also, i know what ppd is but what is ipd?(intense pigment darkening??) i dunno..hmph..someone help me:) |
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Extremely fair/sensitive skin(mild rosacea)that burns very easy.acne is rare/skin is dry.27 years old. |
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Tue May 16, 2006 11:38 pm |
IPD is another UVA protection indicator. If you already know what ppd is and know how high you want, you don't really have to worry about IPD.
This is from MUA (nora80's notepad)
Immediate Pigment Darkening, IPD
The immediate reactions induced by UVA radiation on the skin surface are:an immediate darkening of the pigment and the appearance of a low intensity erythema hidden by the pigment.The appearance of an immediate pigment darkening is relatively easy to detect on subjects with a type III or IV phototype.This phenomena does not even show up on subjects with a I or II type phototype and is frankly difficult to see on individuals with a dark phototype.The immediate pigment darkening that develops after exposure to UVA rays does not really allow a precise reading to be taken. |
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~~ super-sensitive, dry, dermatitis prone, rosacea/northern calif ~~ |
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