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What is "SPF" - Definition & Explanation

(Sun Protection Factor) SPF measures the effectiveness of sunscreen on the body. the test for SPF is done by using a living organism or body to measure the length of time it takes for the skin to redden without coverage or protection.

Some other terms

Some more terms:

Lucet is a method of cordmaking or braiding which is believed to date back to the Viking era. Lucet cord is square, strong, and slightly springy. It closely resembles knitted I-cord or the cord...
A fabric woven of silk and cotton, the warp of one material and the weft of the other. Literally, 'that which is in accordance with the shara, Muslim holy law, which disapproves of an arel made of...
A ballgown is a type of long dress that is fitted at the bodice, with a very full skirt. This is the most formal dress silhouette, usually reserved for the dressiest of occasions. The ballgown looks...
The device (similar to a showerhead) which forms strands of filament as molten polymer is pumped through. It is at this stage that the fiber cross section, fiber size and the number of filaments in a...
A pile fabric with a clipped nap. Before clipping, the nap is a loop as found in frieze or boucle. Velvet was introduced during the Renaissance in Italy and Spain and later moved to France. Designs...

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