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SPF Values & Its True Effects

Faris Rahman

on 10 September 2014

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Transcript of Sunscreen

PROBLEM & OBJECTIVE METHOD RESULTS CONCLUSION Protection Level Method Analysis 5 sunscreens were tested

Sunprint Paper Different SPFs
Paste Attribute
Brand Materials Used A blue coloured paper made by mixing photosensitive chemicals.
Used to make unique designs. Sunprint Paper Materials Used What is it? Sunscreens How does it work? Expose to direct sunlight for 2-5 minutes. Step 1 Materials Used Sunprint Paper Arrange your objects on a piece of Sunprint paper. Place the acrylic pressing sheet on top. Step 2 Step 3 Allow the
Sunprint paper to dry. Rinse Sunprint paper in water. Step 4 Step 5 Graph of Protection Level (%) vs SPF Value Method A layer of sunscreen was applied onto the acrylic pressing sheet. This acrylic sheet was then placed onto the Sunprint paper. Together, they were then brought to the open area outside LT5 between 12-2pm. After 3 minutes of exposure, the sample was brought indoors. 8 Results were recorded and tabulated. 7 The blue colour brightness and intensity were compared using Photoshop’s Adobe Colour Picker. 6 Using a towel, absorb the excess liquid from the sample and leave it to dry. 5 It was then immersed in a cold water bath, that was pre- mixed with a few drops of lime juice, for 2 minutes. 1 2 3 4 5 6 7 8 We discovered that... Higher SPF provides more protection. However, this increase in protection reduces after SPF 50. Quantifying Our Results Brightness (%)
[higher value: brighter] Blue component
[0: no light, 255: brightest light] Adobe Color Picker To illustrate our findings better... The best way to solve a problem is to attack the cause of it. -Spanish Proverb ULTRAVIOLET RADIATION Appropriate amount of UV is beneficial as it induces the production of vitamin D in the skin. Overexposure triggers suntan, sunburn or even some forms of skin cancer. A DOUBLE-EDGED SWORD FOR THE HUMAN BODY Sunscreen is one of the greatest human inventions. Preventive Measure SUNSCREEN These potential hazards are raising concerns about taking precautions against UV radiation. Research Objective A set definite objective must be established if we are to accomplish anything in a big way.
-John McDonald Examine the degree of UV protection provided by sunscreens (SPF 30, 50, 65, 80 and 130).

Ascertain whether the effectiveness of the sunscreen varies linearly with the SPF value. WHAT WE WANT TO ACHIEVE SHORT-TERM OBJECTIVE LONG-TERM OBJECTIVE Raise awareness about the true meaning of SPF and the importance of other ingredients in sunscreens.

Determine the absorption and reflection capabilities of each grade of sunscreen.

Provide essential information to better educate consumers about their usage. Research Problem RECOMMENDATIONS Sunscreens of similar paste attribute Widen research scope to other products with SPF component Conduct the experiment in an area with minimal
structures 1 2 3 RECOMMENDATIONS Lotion vs Spray More consistency in the thickness of sample applied Lip balm,
cosmetics Sunglasses Avoid indirect UV radiation :concrete structures reflect UV radiation Open Field Concrete Area CONCLUSION -Higher SPF values: No significant increase in level of protection Measure the effectiveness of the sunscreens -Sunprint papers
-Photoshop’s Adobe Colour Picker Results Limitations

Hypothesis not completely true Better educate consumers about usage of sunscreens

Raise awareness about the true meaning of SPF Higher SPF values do not provide more protection Acrylic Pressing Sheet Dry Towel Water Lime Juice Sunprint Paper Sunscreens Materials Used Sunprint Paper Materials Used Banana Skin
Easy to use
Responsive to sunlight Why did we choose it? The History The sun protection factor of a sunscreen is a laboratory measure of the effectiveness of sunscreen — the higher the SPF, the more protection a sunscreen offers against UV-B (the ultraviolet radiation that causes sunburn. There is a popular oversimplification of how SPF determines how long one can stay in the sun. For example, many users believe that, if they normally get sunburn in one hour, then an SPF 15 sunscreen allows them to stay in the sun fifteen hours (i.e. fifteen times longer) without getting sunburn. This would be true if the intensity of UV radiation were the same for the whole fifteen hours as in the one hour, but this is not normally the case. SPF Jingxiang - Research Problem & Objective

Lester - Method

Faris - Results

Ying Shan - Conclusion Respective Parts THANK YOU! Franz Greiter (Austria) Benjamin Greene
(Miami pharmacist & airman) Eugene Schueller (French) It is common sense to take a method and try it. If it fails, admit it frankly and try another. But above all, try something. Method Analysis -Franklin D. Roosevelt Blue Spectrum Before exposure Darker:
MORE exposure to UV Brighter: LESS exposure to UV DEFINITION The sun protection factor (SPF) of a sunscreen is a laboratory measure of the effectiveness of sunscreen — the higher the SPF, the more protection a sunscreen offers against UV. -MedicineNet.com WHAT WE WANT TO INVESTIGATE? $$$ Samples Obtained Data Tabulation $25 $35 REACHES A PLATEAU Arjun Jingxiang Lester Faris Ying Shan
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