SPF rating
recently I have bought products were the SPF rating (eg: SPF 20, SPF 30 etc) has been blanked out on the box. I have heard that because many products dont provide the broad specturm protection they need to blank out or stop the claims of their SPF level. These legislations have been passed in USA as far as I know. Anyone know how the progress of this is going in Australia, and also what products have good SPF rating that is still valid?
Replies
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15 yrs, 5 mths ago
There are 3 types of UV rays, A, B and C. SPF means protection against UVB radiation which prevent sunburn, but not UVA and UVC which cause pigmentation and ageing.
Most measurements for UVB protection are done in vivo, that is in a living model, and for UVA and UVC they are done in vitro, that is in a laboratory. In vivo is always accurate and in vitro is so-so. Eventhough some are broad spectrum, tests for UVA and C are done in vitro, thats why the `blanking of ratings`
Thats when a broad spectrum sunscreen come to play which is tested by new japanese technology.
There are no `ratings` in Aus. It is In UK which are now revised and stadardised. 3 stars being the lowest and 5 being the highest protection.
SPF 30 is the maximum SPF you can get in Aus, but some European countries have upto 50.
Yes and diluting it with others moisturisers reduces the effect, also if you mix two SPF 15 sunscreens, you don`t get 30! -
15 yrs, 5 mths ago
There are 3 types of UV rays, A, B and C. SPF means protection against UVB radiation which prevent sunburn, but not UVA and UVC which cause pigmentation and ageing.
Most measurements for UVB protection are done in vivo, that is in a living model, and for UVA and UVC they are done in vitro, that is in a laboratory. In vivo is always accurate and in vitro is so-so. Eventhough some are broad spectrum, tests for UVA and C are done in vitro, thats why the `blanking of ratings`
Thats when a broad spectrum sunscreen come to play which is tested by new japanese technology.
There are no `ratings` in Aus. It is In UK which are now revised and stadardised. 3 stars being the lowest and 5 being the highest protection.
SPF 30 is the maximum SPF you can get in Aus, but some European countries have upto 50.
Yes and diluting it with others moisturisers reduces the effect, also if you mix two SPF 15 sunscreens, you don`t get 30! -
15 yrs, 5 mths ago
There are 3 types of UV rays, A, B and C. SPF means protection against UVB radiation which prevent sunburn, but not UVA and UVC which cause pigmentation and ageing.
Most measurements for UVB protection are done in vivo, that is in a living model, and for UVA and UVC they are done in vitro, that is in a laboratory. In vivo is always accurate and in vitro is so-so. Eventhough some are broad spectrum, tests for UVA and C are done in vitro, thats why the `blanking of ratings`
Thats when a broad spectrum sunscreen come to play which is tested by new japanese technology.
There are no `ratings` in Aus. It is In UK which are now revised and stadardised. 3 stars being the lowest and 5 being the highest protection.
SPF 30 is the maximum SPF you can get in Aus, but some European countries have upto 50.
Yes and diluting it with others moisturisers reduces the effect, also if you mix two SPF 15 sunscreens, you don`t get 30! -
15 yrs, 5 mths ago
standard controls in Australia are much more stricter – but keeping in mind, SPF 30 doesn`t mean that it will completely block UV or other radiation; it will only slow your exposure or rate of burning by 30 times, which varies from person to person
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15 yrs, 5 mths ago
standard controls in Australia are much more stricter – but keeping in mind, SPF 30 doesn`t mean that it will completely block UV or other radiation; it will only slow your exposure or rate of burning by 30 times, which varies from person to person
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15 yrs, 5 mths ago
standard controls in Australia are much more stricter – but keeping in mind, SPF 30 doesn`t mean that it will completely block UV or other radiation; it will only slow your exposure or rate of burning by 30 times, which varies from person to person
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15 yrs, 8 mths ago
i havnt heard anything about this but i would not feel safe puttin it on if the spf wasnt confirmed!?!?!
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