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

Author(s):  
Myriam Sohn ◽  
Bernd Herzog ◽  
Uli Osterwalder ◽  
Georgios Imanidis
2017 ◽  
Vol 2 (1) ◽  
Author(s):  
Youstiana Dwi Rusita ◽  
Indarto A.S

Abstract : SPF, Kayumanis, Pomegranate, Lotions. The Sun produces ultraviolet radiation that causes damage to the skin texture, premature aging, burning skinreactions and skin cancer in exposed skin in a long period. One of the ways to protect skin from UV radiation use sunscreen lotions. Stem bark of cinnamon (Cinnamomun burmani) and pomegranate peel (Punica granatum) is known as an antioxidant activity and have a compound that is potentially as sunscreens. This research aims to know the activity of sunscreen with an SPF value of sunscreen lotions of pomegranate peel and cinnamon extract and the warming rays of the Sun and closed space. The determination of the value of the sun protection factor is done with methods of in vitro in Mansur using spectrophotometer UV-Vis. SPF Value calculated based on the Absorbance at a wavelength of 290-320 nm. The result is a non parametric Test is analyzed using MannWhitney test. Results of organoleptic the colored is yellow brown, like to emultion and shaped the distinctive, smell of cinnamon, less homogeneous, showed the value of pH5.63, dispersive power 6 cm, adhesion 1.75 seconds and viscosity 5,500 cps. Preparations that are exposed in the Sunlight showed the value of SPF 20.146 hereaspreparations stored in enclosed space showed the value of SPF 26.398. The results of statistical tests indicate that there is no difference between the SPF on reparations that are exposed to sunlight and in a closed space with alpha value > 0.05.


Cosmetics ◽  
2020 ◽  
Vol 7 (1) ◽  
pp. 16 ◽  
Author(s):  
Muhammed Majeed ◽  
Shaheen Majeed ◽  
Renuka Jain ◽  
Lakshmi Mundkur ◽  
H. R. Rajalakshmi ◽  
...  

Ultraviolet (UV) rays and its harmful effects have always been a concern to skin health. Sunscreen and sunblock prevent the harmful effects of UV radiation on the skin. Sun Protection Factor (SPF) is an indication of the sun-protective capacity of an ingredient. There is an ever increasing interest in the cosmetic industry for developing novel functional ingredients from natural sources. The purpose of this study was to determine in-vitro and in vivo SPF of natural 90% pterostilbene extracted from the dried heartwood of Pterocarpus marsupium (Indian Kino). The SPF of purified pterostilbene and a formulation containing 0.4% pterostilbene was determined In Vitro using a UV spectrophotometer. Pterostilbene had an SPF of 21.73 ± 0.06, while the cream formulation had an SPF of 8.84 ± 0.01. The in vivo SPF of the 0.4% pterostilbene cream in humans was found to be 6.2 ± 1.30. Primary skin irritation tests in human subjects showed the formulation was safe and had no irritation potential. Pterostilbene was also found to have significant antioxidant activity as determined by free radical scavenging assays in vitro. These results suggest that natural pterostilbene is an antioxidant and shows SPF value both in-vitro and in the human clinical study and thus could be used as an ingredient in topical sun-protective formulations.


2017 ◽  
Vol 2 (2) ◽  
pp. 198
Author(s):  
Dewi Ekowati ◽  
Inaratul Rhizky Hanifah

The over exposure sunlightis on the skin provides of damage. Skin damage caused the over exposure sunlightis can occur in the short term such as erythema or long term such as premature skin aging and even skin cancer. One way that can be done to minimize the amount of UV that penetrated into the skin is to use sunscreen. Corn cob contain the chemical compounds of phenolic, which suspected to have the protection activity toward the UV B rays. The study aims to make preparations hand body lotion that meet good physical quality of the corn cob extract  as a sunscreen. Hand made three body lotion formula with extract concentrations of corn cob 10% FI, FII FIII 15% and 20%. Testing the physical properties of the test hand body lotion include viscosity, dispersive power and pH. The effectiveness of a sunscreen is based on a determination of the value of the Sun Protection Factor (SPF) in vitro. The third formula has a good physical quality lotion that viscosity 50-1000 dPas, the scatter 5-7 cm, pH 4.5 -7. The effectiveness of sunscreen based on the value of the Sun Protection Factor (SPF), the effectiveness FIII in the category of extra protection is 7.23. SPF value FI  FII 5.13 and 5.67 so that FI and FII into the category of moderate protection


2019 ◽  
Vol 4 (2) ◽  
pp. 26-31
Author(s):  
Rabiatul Adawiyah

The sunscreens or Sun Protecting Agent is the materials protecting the skin from the exposure to ultraviolet (UV) rays. Amount of Sun Protection Factor shows how many times the subject skin protection can be multiplied under the sun rays without erythema occurs. Kalakai contains some bio-active substance like phenol, flavonoid, alkaloid and terpenoid family which are proven as a very effective antioxidant. The purpose of this research was to determine the concentration of ethanol extract of kalakai root which has the potential as a sunscreen based on the Sun Protection Factor (SPF) parameter. Determination of SPF amount was carried out in vitro by UV-VIS spectrophotometer at a concentration of 50 ppm, 100 ppm, 150 ppm, 200 ppm, 250 ppm, 300 ppm, and 350 ppm with a wavelength of 290-320 nm. The result showed that kalakai root ethanol extract indicated potential as a sunscreen at a concentration of 300 ppm and 350 ppm obtained SPF values respectively 11 and 14 classified as sunscreens with extreme ability levels.


2008 ◽  
Vol 50 (2) ◽  
pp. 159-161 ◽  
Author(s):  
Céline Couteau ◽  
Roula Chammas ◽  
Soumia Alami-El Boury ◽  
Benjamin Choquenet ◽  
Eva Paparis ◽  
...  

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