| Titre : |
In vitro study into the SPF and UVA-PF using different applicators |
| Type de document : |
texte imprimé |
| Auteurs : |
Saul Pyle, Auteur ; Dearbhaile Lynn, Auteur ; Don Ross, Auteur |
| Année de publication : |
2013 |
| Article en page(s) : |
p. 255-261 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Cosmétiques -- Appareils et matériels
Cosmétiques -- Application-dosage
Etude in vitro
Etude in vivo
Facteur de protection solaire
Produits antisolaires
Rayonnement ultraviolet A
|
| Index. décimale : |
668.5 Parfums et cosmétiques |
| Résumé : |
This report investigates the impacts of applicator materials on the in vitro SPF method and calculated UVA-PF following a method based on ISO 24443. The study found that the in vitro SPF varied considerably with changes to applicators. It was observed that particular characteristics of the applicators contributed to the measured SPF, where smooth textures that are often peculiar to particular materials generated the highest SPF and rough textures yielded a lower SPF. The potential mechanism behind the measured SPF was investigated and discussed including the potential implications on ISO 24444, which permits the use of applicators.
The calculated UVA-PF also varied with applicator and was observed to have an inverse relationship with the in vitro SPF, but the variability was far les pronounced and relatively erratic. Therefore, it was difficult to confirm the inverse relationship as absolute and further investigation may be necessary with a larger sample size allowing more detailed analysis that may highlight a more complicated trend.
While the reasoning behind the variation in UVA-PF is not well understood, a contributing factor relating the limits of detection at higher SPFs is visited, as observed on the 'adjusted normed mean curves' as found in the ISO 24443 spreadsheet, where the UVB aspect of the absorbance curve deviates from normality. The ramification of this deviation is then discussed, where it is noted that where the C value used to adjust the curve using the measured in vivo SPF is an indicator of reliability according to the recommended range (0.8 -1.6), it is not a dependable measure. |
| Note de contenu : |
- EXPERIMENTAL : Equipment - Materials - Products - Applicator selection - Review - Analysis - Robustness and repeatability - Water resistance
- RESULTS AND DISCUSSION : Applicator analysis - Material and texture - Microscopic film evaluation - Adjusted normed mean - Robustness and repeatability - Water resistance |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=20159 |
in IFSCC MAGAZINE > Vol. 16, N° 4 (10-11-12/2013) . - p. 255-261
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