What is self-protection time?
Self-protection time of the skin describes the amount of time that a person can spend unprotected in the sun within a day before the skin begins to redden. It depends on the skin type, the amount of sunlight and the environment. If you are in the water, for example, the self-protection time of the skin decreases due to the reflection of the sun's rays in the water.
To be on the safe side, it is therefore generally recommended to only use around 60% of the self-protection time. However, if you then consider the self-protection times given above and subtract a third from this, there is not much time left for sunbathing for most skin types.