Semi-milled finish

A finish on tightly milled fabrics containing wool.

Semi-open shedding

A type of shedding in which threads that are to remain in the top shed line for the next pick are lowered a short distance and are then raised again. The other threads are raised and lowered as in open shedding. (See also shedding.)

Semi-suppressed balloon spinning

A system of ring spinning in which the rotating yarn balloon is greatly reduced at the start of an empty bobbin and is allowed to expand later when the bobbin is becoming filled yarn. The small-balloon condition is achieved by allowing contact between the rotating balloon and the spindle top. As the bobbin fills, contact is lost and the yarn balloon is allowed to expand.
Note 1: Special spindle top extensions are used to obtain the required effect.

Semi-worsted spun

A term applied to yarn spun from sliver produced by carding and gilling in which the fibres are substantially parallel, the carded sliver not having been condensed or combed. Alternatively, the yarn may be produced from a roving.
Note.. The above definition is descriptive of processing technique and not of fibre content.

Sennit rope

A rope formed by braiding or plaiting the strands together.(sub category of rope)

Separating course (weft knitting)

A course of knitted loops separating one garment or garment part from another, that, on removal, permits the separation of articles that are knitted as a succession of interconnected units. Separating courses may be cut, unroved, or dissolved, and several such courses may be made consecutively.

Sequential knitting (weft knitting)

The knitting of shaped garment pieces in a fixed sequence, for example, a front, a back and two sleeves.

Sequestering agent

A chemical capable of reacting with metallic ions so that they become part of a complex anion. The principle is used to extract calcium and magnesium ions from hard water, iron
(ii) and copper ions from peroxide bleach liquors and various metallic ions from dyebaths, by forming a water-soluble complex in which the metal is held in a non-ionizable form.

Sequestrant

Any compound that will inactivate a metallic ion by forming a water-soluble complex in which the metal is held in a nonionizable form. This results in prevention of the usual precipitation reactions of the metal.

Serge

A piece-dyed fabric of simple twill weave (usually 2/2) of a square or nearly square construction and with a clear finish. It was originally made of wool, but now is sometimes made of other. fibres, or of blends of wool with other fibres.

Serging

1. Overcasting the cut edge of a fabric to prevent raveling. 2. Finishing the edge of a carpet by oversewing rather than binding. Generally the sides of a carpet are serged and the ends bound.

Sericin

A gelatinous protein, comprising 20% to 30% by mass of raw silk, cementing the two fibroin filaments (brins) in a silk have.

Served Yarn

In aerospace textiles a reinforcing yarn such as graphite or glass around which two different yarns are wound i.e. one in the Z direction and one in the S direction etc. for protection or compaction of the yarn bundle.

Set

1. A term used to indicate the density of ends or picks or both in a woven fabric, usually expressed as the number of threads per centimetre. The state of the fabric at the time should be described, e.g., loomstate or finished.
2. See count of reed

Set (testing)

Strain remaining after complete release of the load producing the deformation.