Recovery

See ELASTIC RECOVERY.

Recreational Surfaces

Manufactured surfaces providing consistent properties durability and special characteristics as needed for the specific application. Included are artificial turf pool decks indoor-outdoor carpeting tennis court surfaces etc. Most types of © 2001 Celanese Acetate LLC constructions (knit woven tufted and nonwoven) and most polymer types find use in this market. The polyolefins are particularly prominent in these applications.

Redox potential

The potential developed when a bright platinum electrode is immersed in a solution containing an ionic species in two interconvertible oxidation (valency) states. The potential is dependent upon the ratio of the concentrations of the two oxidation states, e.g., iron 11 and iron 111 ions; 1,4 dihydroxybenzene (hydroquinone) and 1,4-benzoquinone (p-benzoquinone); vat dye and leuco vat dye.
Note.. The standard redox potential, E, is that developed when the concentrations of the two oxidation states are equal to each other, and in vat dye systems indicates the difficulty with which the vat dye (the oxidized state) can be reduced.

Reduction clearing

Removal of unfixed dyestuff (usually disperse) by an aqueous alkali/reducing system, usually sodium hydroxide/sodium dithionite.

Reed

1. A device, consisting of several wires closely set between two slats or baulks, that may serve any or all of the following purposes: separating the warp threads; determining the spacing of the warp threads; guiding the shuttle or rapier (if applicable); and beating up the weft.
2. To draw ends through a reed. (In the U.K., also known as: to sley, to bob the reed, or to enter the reed.)

Reed gratings

Transparent plates containing lines that are parallel and uniformly spaced in the cross-wise direction. By placing an appropriate grating on a reed it is possible to see if there is any irregularity in the spacing of the reed wires. Reed gratings can also be used for counting the number of reed wires per unit distance. (See also parallel line gratings.)

Reed mark

A warp way crack in a woven fabric caused by a damaged or defective reed.

Reed Marks

A fabric defect consisting of warpwise light and heavy streaks in a woven fabric caused by bent unevenly packed or weak reed wires.

Reed number

The number of dents per unit width of reed.
Note 1: There have been many units in common use, e.g.,
(i) the number of dents per inch,
(ii) the number of dents per 2 inches,
(iii) the number of groups of 20 dents per 36 inches,
(iv) the number of dents per 1O cm .
Note 2: The recommended unit is dents/cm.

Reed, leasing

A reed constructed to permit warp ends passing through it to be separated into sheets suitable for lease formation. The usual construction consists of alternate open and blocked dents, but more complicated arrangements are sometimes used to aid segregation of particular ends, e.g., of one colour in a fancy warp.

Reed, Scotch hook

A reed used in 'striking' a lease during the cotton-system sizing of manufactured continuous filament warps. In simple form, each reed wire is provided with a small hook at the same side and at the same height in the reed. Warp ends passing through the dents may be engaged in the hooks or passed above them during formation of a lease. More complicated constructions make use of two hooks per wire and blocked dents to aid segregation of particular ends, e.g., of one colour in a fancy warp.

Reed-plate

A flat comb-like plate with slots on one side spaced in accordance with the machine gauge.(sub category of basic components tufting machine (carpet))

Reeding plan

An indication of the position of the reed wires in relation to the ends in one weave repeat.

Reel

1. See also hank.
2. The cylindrical former, usually flanged, suitable for use with domestic sewing machines, on to which sewing thread is wound.
3. The revolving drum, mill or swift of a section warping machine.
Note: One end of the reel is conical in order to accommodate the increasing diameter of each section as it traverses laterally. (See also warping mill.)

Reel

backwinding (spinning)) on to a suitable package.
Note 2.. The hank is the traditional unit of length in the indirect system of yarn count, e.g., the cotton count of a yarn is calculated as the number of hanks of 840yds per pound (see Table, p.397).
2. A synonym for count as applied to sliver, stubbing or roving. (See also lea.)hank sizing; skein sizingThe application of size solution to yarn in hanks.