Flax is an upright, annual plant of the genus Linum (family Linaceae). The most widespread version of flax is Linum usitatissimum, which is native to a vast area extending from the eastern Mediterranean to India. The plant is cultivated either for its seed (linseed) or for its fibres.

Flattened French canvas, or French canvas, is a nineteenth century form of canvas widely used in France. It was made in cotton, flax or hemp, and sometimes cotton with flax.

Fish scale embroidery is a technique that was popular in nineteenth century Britain. The fish scales usually came from carp, goldfish or perch, as their scales were regarded as the most iridescent. Fish scale embroidery was worked on silk, satin or velvet ground cloth and the scales were used to imitate flower petals, bird feathers and butterfly wings.

Fine d'Aubusson is a four-stranded Merino woollen thread made in France by the firm of La Route de la Laine for the retailers of Au Ver à Soie. It is basically a worsted thread rather than a springier tapestry or woollen yarn. Fine d’Aubusson can be used for a variety of crewel embroidery forms, as well as for fine work, such as tambour embroidery.

Filoselle silk is a silk yarn used in embroidery. It is made from filoselle, the portion of a silk cocoon that is not used for good quality silk cloth or yarn because the filaments are damaged or broken. Filoselle silk was introduced in Europe and North America in the 1850's.

Filoselle is the portion of a silk cocoon that is not used for good quality silk cloth, because the filaments are damaged or broken. Filoselle is normally carded, spun and then plied to make silk yarns. Six-stranded filoselle silk embroidery thread became popular in the late nineteenth century for various types of embroidery.

Filo-floss silk thread is a trade name for a silk thread produced by the British company of Pearsall's (Filo-floss six-stranded embroidery thread). 

Fancy-work is an eighteenth and nineteenth century English language term often used for embroidery.

Economy stitch is a synonym for a one-sided satin stitch, whereby the embroidery thread is mainly used on the obverse of the cloth, rather than also covering the reverse as with the satin stitch. This stitch was chosen for economic purposes, since less thread is used than with the normal satin stitch.

Page 189 of 202