TextileGlossary.com

What is "UPF" - Definition & Explanation

(Ultraviolet Protection Factor) The UPF rating indicates how effective a fabric is at blocking out solar ultraviolet radiation from reaching the skin. UPF ratings range from 15 to 50 with higher ratings indicating more effective blocking and therefore better protection for the wearer of a garment. Fabrics that test higher than UPF 50 are rated as UPF50+. UPF testing involves exposing a fabric to ultraviolet radiation (UVR) and measuring how much is tranmitted through the sample. Different wave-lengths of radiation in the UVR spectrum have different effects on human skin and this is taken into consideration when calculating the UPF rating. Factors that contribute to the UPF rating of a fabric are:

Composition of the yarns (cotton, polyester, etc)

Tightness of the weave or the knit (tighter improves the rating)

Color (darket colors are generally better)

Stretch (more stretch lowers the rating)

Moisture (many fabrics have lower ratings when wet)

Condition (worn and faded garments may have reduced ratings)

Finishing (some fabrics are treated with UV absorbing chemicals).

Some other terms

Some more terms:

A good quality wool. If it is made in cotton, it is usually called suede cloth. Duvetyn has a close satin weave that is brushed, singed, and sheared to conceal the weave. It has a smooth plush...
A Sheer Fabric Often A Lawn Or Batiste, Usually Of Cotton Or Cotton Blend, With A Small Dot Pattern. The Dots Are Usually Woven Into The Fabric But May Be Flocked Or Printed . Used For Curtains,...
Grommets and eyelets are metal, plastic, or rubber rings that are inserted into a hole made through another material. They may be used to reinforce the hole, to shield something from the sharp edges...
A general term to describe fabrics with a blister (pucker) on the surface. The blister may be created by several different methods such as printing with caustic soda or other chemicals, by weaving...
Also known as “vegetable cashmere”, soybean fiber is a sustainable textile fiber made from the residue of soybeans from tofu production. It is part of an effort to move consumers away from...

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