British Study: How to Use Sunlight

People get less than half of the sun protection expected from protective loonys, but the problem is not loony, but its application.

Scientists at London's Royal College say that in theory the use of a 15 - factor protection lot is sufficient to prevent sunburn. But, in reality, people need lotions with 30 or 50 factors to be sure, say the authors of the study, who have conducted experiments with volunteers in their laboratory.

The 50 - factor display, typically applied, guarantees 40 percent of the expected protection. Researchers have examined how much people are protected by wearing various amounts of sun protection lotion with various factors.

The protective cream should be applied to a thick enough layer, which many of us do not. And the lotion classification is based on the presumption that 2 mg lotion should cover a square inch of skin. This means that one should use at least six teaspoons full of lotion, or 36 mg, to cover the body of an average adult. Lip and ear areas are usually not painted, but they should be taken care of as well.

Dermatologists recommend that the cream of the beach be applied 15 to 30 minutes before exposure to the sun so that it can dry up. And the process should be repeated every two hours, as well as immediately after exiting the sea. Some lotions are said to be resistant to water by claiming to guarantee the same protection after immersion.

However, over 85 percent of the product can be removed after a towel dry, so swimming, sweating, or other activity must be applied. Another important factor is the reflection of sunlight, which can significantly increase the power of radiation; thus, in snow, reflection causes 85 percent growth, while sand and water, respectively, increase radiation by 17 percent and 5 percent. / TCh/