Calculation of the sun protection factor of sunscreens with different vehicles using measured film thickness distribution — Comparison with the SPF in vitro

Diffey, 2009, Reported sun exposure, attitudes to sun protection and perceptions of skin cancer risk: a survey of visitors to Cancer Research UK's SunSmart campaign website, Br. J. Dermatol., 160, 1292, 10.1111/j.1365-2133.2009.09149.x Moyal, 2008, Broad-spectrum sunscreens provide better protection from solar ultraviolet-simulated radiation and natural sunlight-induced immunosuppression in human beings, J. Am. Acad. Dermatol., 58, 149, 10.1016/j.jaad.2007.04.035 Seité, 2010, Photodamage to human skin by suberythemal exposure to solar ultraviolet radiation can be attenuated by sunscreens: a review, Br. J. Dermatol., 163, 903, 10.1111/j.1365-2133.2010.10018.x Green, 2011, Reduced melanoma after regular sunscreen use: randomized trial follow-up, J. Clin. Oncol., 29, 257, 10.1200/JCO.2010.28.7078 Green, 1999, Daily sunscreen application and betacarotene supplementation in prevention of basal-cell and squamous-cell carcinomas of the skin: a randomised controlled trial, Lancet, 354, 723, 10.1016/S0140-6736(98)12168-2 ISO 24444 Rohr, 2010, In vitro sun protection factor: still a challenge with no final answer, Skin Pharmacol. Physiol., 23, 201, 10.1159/000292777 Marguerie, 2012, A new chemical approach to optimize the in vitro SPF method on the HD6 PMMA plate, J. Cosmet. Sci., 63, 243 Pissavini, 2009, Characterizing roughness: a new substrate to measure SPF, Cosmet. Toiletries, 124, 56 Miura, 2012, Influence of application amount on sunscreen photodegradation in in vitro sun protection factor evaluation: proposal of a skin-mimicking substrate, Photochem. Photobiol., 88, 475, 10.1111/j.1751-1097.2011.01042.x Miksa, 2013, Adjusting substrate/product interfacial properties to improve in vivo/in vitro SPF correlation, Cosmet. Toiletries, 128, 170 Rhodes, 1997, Fluorescence spectroscopy: a rapid, noninvasive method for measurement of skin surface thickness of topical agents, Br. J. Dermatol., 136, 12, 10.1111/j.1365-2133.1997.tb08739.x Fageon, 2009, Importance of sunscreen products spreading protocol and substrate roughness for in vitro sun protection factor assessment, Int. J. Cosmet. Sci., 31, 405, 10.1111/j.1468-2494.2009.00524.x Ferrero, 2003, Efficiency of a continuous height distribution model of sunscreen film geometry to predict a realistic sun protection factor, J. Cosmet. Sci., 54, 463 Herzog, 2009, Models for simulation of sun protection factors and indices characterizing the UVA protection of sunscreens: principles and applications O'Neill, 1984, Effect of film irregularities on sunscreen efficacy, J. Pharm. Sci., 73, 888, 10.1002/jps.2600730707 Lademann, 2004, Influence of nonhomogeneous distribution of topically applied UV filters on sun protection factors, J. Biomed. Opt., 9, 1358, 10.1117/1.1805557 Pissavini, 2013, The likelihood of sunburn in sunscreen users is disproportionate to the SPF, Photodermatol. Photoimmunol. Photomed., 29, 111, 10.1111/phpp.12033 Vergou, 2013, Methods for the evaluation of the protective efficacy of sunscreen products, Skin Pharmacol. Physiol., 26, 30, 10.1159/000343576 Ferrero, 2010, How a calculated model of sunscreen film geometry can explain in vitro and in vivo SPF variation, Photochem. Photobiol. Sci., 9, 540, 10.1039/b9pp00183b Sohn, 2015, Porcine ear skin as a biological substrate for in vitro testing of sunscreen performance, Skin Pharmacol. Physiol., 28, 31, 10.1159/000358273 Sohn, 2014, Film thickness frequency distribution of different vehicles determines sunscreen efficacy, J. Biomed. Opt., 19, 115005, 10.1117/1.JBO.19.11.115005 ISO 25178-602 Herzog, 2004, Prediction of sun protection factors and UVA parameters of sunscreens by using a calibrated step film model, J. Pharm. Sci., 93, 1780, 10.1002/jps.20089 Herzog, 2010, Models for the calculation of sun protection factors and parameters characterizing the UVA protection ability of cosmetic sunscreens, 275 Sayre, 1979, A comparison of in vivo and in vitro testing of sunscreening formulas, Photochem. Photobiol., 29, 559, 10.1111/j.1751-1097.1979.tb07090.x ISO 24443 Herzog, 2002, Prediction of sun protection factors by calculation of transmissions with a calibrated step film model, J. Cosmet. Sci., 53, 11 BASF, BASF sunscreen simulator, https://www.sunscreensimulator.basf.com/(accessed 9 July 2015). Ferrero, 2006, Importance of substrate roughness for in vitro sun protection assessment, IFSCC Mag., 9, 97 Herzog, 2015, Simulation of sunscreen performance, Pure Appl. Chem., 87, 937, 10.1515/pac-2015-0401 Schittkowski, 2003, Numerical data fitting in dynamical systems — a practical introduction with applications and software