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Glossary
    in Terms
    in Terms & Definitions
 
Retention:
the weight of fluid remaining after a freely swollen fibre, yarn or fabric is subjected to a pressure of 0.5 lb/inch2.
Last referenced in: Performance apparel markets: product developments and innovations, 1st quarter 2014 (Performance Apparel Markets Issue 48)

Reticulated foam:
Reticulated foams differ from conventional foams in their cell structure. Reticulation is a process in which cell membranes are destroyed in a controlled explosion and then fused with the cell ribs. Reticulation produces open-celled foam which is especially suitable for the filtration and purification of air and liquids.

Retting (flax):
the subjection of a crop of flax or deseeded flax straw to chemical or biological treatment in order to make fibre bundles more easily separable from the woody part of the stem. See also decortication.
Last referenced in: Sustainability in performance apparel: meeting the demands of an eco-conscious marketplace (Performance Apparel Markets Issue 31)

Revetment:
a support structure in civil engineering made of riprap (coarse armour stone) or concrete.
Last referenced in: Markets for geosynthetic products and profiles of five leading manufacturers (Technical Textile Markets Issue 92)

RFID:
see radio frequency identification (RFID) systems.

Rib fabric:
a knitted fabric with a rib pattern. Depending upon the usage, the pattern can be altered to exhibit different rib effects. Rib fabric is used mainly in round necks and cuffs for certain types of T-shirts. It is also used for making undergarments.

Ribbon yarns:
yarns that are woven or knitted in the form of a ribbon.

Ring spun:
a spinning system in which twist is inserted in a yarn by using a revolving traveller. This method gives a tighter twist than the more modern, faster and usually cheaper open end spinning process.
Last referenced in: The world nonwovens industry: part 3 -- ten smaller producers, 1st quarter 2008 (Technical Textile Markets Issue 72)

Rinses:
washing processes during which denim fabric is desized, rinsed and softened. Rinsing provides fabrics with a softer handle but does not discolour them.

Rip stop:
a lightweight woven fabric containing corded yarns spaced at regular intervals—in both the warp and the weft—which form squares on the surface of the fabric in order to prevent a tear in the fabric from spreading. Common applications include parachutes, outerwear and activewear.

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