Definition von sun protection factor im Englisch Englisch wörterbuch
an indication of how long a sunscreen remains effective when applied to the skin
Example: If someone normally burns in 10 minutes with no sunscreen, then a sunscreen with factor 20 will provide protection for up to 20x10 = 200 minutes.
The degree to which a sunscreen, suntan lotion, or similar preparation protects the skin from ultraviolet rays, usually expressed numerically
number for measuring the level of protection of the skin against the suns rays, SPF