Fish dart

A fish-shaped dart with a small cut at the widest part. It is generally used in the waist of a close fitting garment without a waist seam.

Fish Eye

See PINHOLE.

Fisheye (knitting)

A pulled thread course-wise in weft knitting or wale-wise in warp knitting. In weft knitting a small snag is known as a 'fisheye'

Fishnet, warp-knitted

A range of structures generally having a large diamond net appearance often used for stockings and tights.

Fishnet, weft-knitted

See float-plated fishnet, weft-knitted.

Fissure

A very minute crack or opening in a material that frequently leads to the breaking or rupture of the material.

Fixation

The process of setting a dye after dyeing of printing usually by steaming or other heat treatment.

Fixation accelerator

A product added to a finishing formulation to speed up, or lower the temperature required for, chemical reaction.

Flake

As used by Celanese a term that refers to the granular form in which cellulose acetate and triacetate polymers exist prior to dissolving or feeding into the extrusion or molding unit.

Flake Yarn

Yarn in which roving or short soft staple fibers are inserted at intervals between long filament binder yarns. © 2001 Celanese Acetate LLC

Flaky Web

A web at the card that shows thick and thin places approximately 1 to 6 square inches in size. This indicates that instead of a free flow of fibers through the card either an uneven amount has been fed into the card or groups of fibers have hesitated in the card and then dropped back into production.

Flame resistance

The property of a material whereby flaming combustion is slowed, terminated or prevented.
Note 1: This definition is published in ISO 4880-1984.
Note 2: Flame resistance can be an inherent property of the basic material or it may be imparted by specific treatment. The degree of flame resistance exhibited by a material during testing may vary with test conditions.

Flame Resistant

A term used to describe a material that burns slowly or is selfextinguishing after removal of an external source of ignition. A fabric or yarn can be flame resistance because of the innate properties of the fiber the twist level of the yarn the fabric construction or the presence of flame retardants or because of a combination of these factors. (Also see FLAME-RETARDANT and INHERENT FLAME RESISTANCE.)

Flame retardance

The property of a material whereby flaming combustion is slowed, terminated or prevented.
Note 1: This definition is published in ISO 4880-1984.
Note 2: Flame resistance can be an inherent property of the basic material or it may be imparted by specific treatment. The degree of flame resistance exhibited by a material during testing may vary with test conditions.

Flame retardant

A substance used to impart improved flame resistance to a material.
Note.. This definition is published in ISO 4880-1984. (See also flame resistance.)