High-charged system

A method of dry cleaning in which an oil-soluble reagent such as petroleum sulphonate is added to the solvent so that a significant amount of water can be added to obtain a substantially clear dispersion of water in the solvent. In a high-cliarged system the concentration of added reagent, a so-called detergent, is 4 per cent while in a low-charged system the concentration ranges from 3/4 per cent to 2 per cent.

High-Low Pile

A pile construction characterized by the presence of two or more pile heights. High-low pile carpets sometimes combine looped and cut surface yarns.

High-Shrink Staple

Staple with a higher degree of potential shrinkage than regular staple of the same generic fiber. When blended with regular staple and treated (in yarn or fabric form) to induce shrinkage it produces a high degree of bulk in the product.

High-speed spinning (melt spinning)

A melt spinning process in which filaments are drawn from the spinneret and collected at high speeds. (See also fully oriented yarn and partially oriented yarn.)
Note: Speeds above about 3000 m. min-' are currently classed as high.

High-temperature dyeing

Dyeing at high pressure (above atmospheric) in order to dye at a temperature above the normal boiling point.

Highloft

General term for a fiber structure containing more air than fiber. Specifically a lofty low-density nonwoven structure that is used for applications such as fiberfill insulation health care personal protection and cleaning material.

Highly oriented yarn

A melt-spun continuous-filament yarn that has been highly oriented either by drawing at a high draw ratio (preferred term, fully drawn yam) or by spinning at a high wind-up speed such that little residual drawability remains (preferred term, highly oriented yarn). (See also draw-twist, draw-wind, spin-drawing and draw-spinning.)
Note: These terms are used in contrast to low orientation yarn and partially oriented yarn.

Hitch-Back

See STICKER 1

Hockle (cordage)

Deformation of the strands in a laid rope caused by the removal of kinks by pulling them out of the rope by force causing helical deformation of the strands themselves.

Hoffman press

Garments and knitted goods are pressed by being placed on a perforated, fabric-covered steam bed and subjected to pressure by lowering a second, hinged steam-bed on to the material. Steam is blown through the material while under pressure and the fabric can be cooled by drawing air through it. This type of machine is often known as a Hoffman press and the process as Hoffman pressing.

Hog wool

The first clip from a sheep not shorn as a lamb.

Hoggett wool

The first clip from a sheep not shorn as a lamb.

Hole count

The finished quality of lace and net differs from the quality ill the machine state owing to dimensional changes introduced in dressing. The finished quality of plain net is traditionally expressed as the sum of the hole count per inch warp-way and the hole count per inch bobbinway.

Holes (Tow)

In tow opening processes partial or complete filament breakage within a confined spread of tow usually circular or oval in shape. Not to be confused with splitting or partial crimp deregistration which are linear.

Holland

1. Originally, a fine, plain-woven linen fabric, made in many European countries, but especially in Holland.
2. A plain, medium-weight cloth of cotton or linen with a beetled or glazed finish, used chiefly for window blinds, interlinings, and furniture covering.