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With the aid of these charts it is simple
to select the correct individual protection factor,
taking into account the varying radiation intensities
and different skin types.
Correct use of sunscreens
How they are used
It is frequently the case that the sunscreen is applied
and rubbed into the skin only after arriving at the
beach. Nevertheless, sun screens require at least 30
minutes to develop their protective capacity, given
that the chemical filters must first bond to the skin.
The consequence to the user's ignorance to this is the
appearance of a sun erythema in spite of the application
of the sun screen.
For people with skin types I - III,it is of maximum
importance to apply a sun screen at least 30 to 45 minutes
before direct exposure to the sun This recommendation
is valid for the beach, mountain or snow.
What to use for children
Sun screen preparations for children must offer a protection
factor for UVB of 15,at least, as well as sufficient
protection against UVA. The skin's memory: Recent scientific
advances have confirmed the clear correlation which
exists between severe sunburn in childhood and melanoma
in later life.
Beach umbrellas and shade
The belief that beach umbrellas and shade can guarantee
a complete protection against UV radiation can result
in painful sunburn. The reason being that the scattering
effect is very high with shorter wavelengths, in such
a way that the skin may receive a very excessive dose
of UV radiation without direct exposure to the sun.
To protect the skin against UV radiation it is necessary
to take into account the ''the shadow rule'' if your
shadow is shorter than your body, There is danger of
UV skin damage.
Water as protection
The generalized belief that staying in the water protects
the skin from UV radiation is an error; even at a depth
of one metre, the intensity of the UVB radiation is
nearly 50% of the total, even in these conditions may
result in a sun erythema. Moreover, the cooling effect
of the water often masks any pain.
SUMMARY: To achieve adequate
protection against the sun the skin pigmentation type,
location, duration, and intensity of UV exposure should
be taken into account
Those people with skin which is extremely sensitive to
the sun must adopt unconditional precautions which are
adequate against UVA and UVB radiation. UVB.
The sun protection factor does not provide more protection
because it is higher, but for a longer time period, if
it is correctly applied and suitable for the skin type.
In case of problems, consult a dermatologist.
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