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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:

A unicellular, natural staple fiber hitch is the seed hair of plants of the genus Gossypium. It is almost pure cellulose and a distinguishing characteristic is its irregular spiral configuration. The...
Fold of fabric, folded back upon itself so that the pleat is comprised of three layers; occurs vertically only. Pleats may be partially stitched or pressed down. Kinds of pleats include: knife...
The term fur refers to the fine, soft body hair of non-human mammals. True fur comes from animals where the coat consists of short ground hair and long guard hair. Fur served as an important source...
Dyes derived from insects or from the earth, including dyes made from plants and bark, which includes madder root, indigo, milkweed, pomegranate, Osage, cutch and cochineal. These also include...
Serge is a type of twill fabric that has diagonal lines or ridges on both sides, made with a two-up, two-down weave. The worsted variety is used in making military uniforms, suits, great and trench...

Companies for SPF:


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