Doctor

A straight-edged metallic blade mounted parallel to a moving surface, e.g., a printing roller, to remove excess of, or unwanted, material.

Doctor Blade

A metal knife that cleans or scrapes the excess dye from engraved printing rollers leaving dye paste only in the valleys of engraved areas. Also used to describe other blades that are used to apply materials evenly to rollers or fabrics.

Doctor streak

A white or coloured streak in the length wise direction on a coated or printed substrate caused by a damaged or incorrectly set doctor.

Doeskin fabric

A five-end satin or other warp-faced fabric with dress-face finish.
Note: Today, other weaves, such as 2/1 warp twill and 311 broken crow, are very often used and given a dressed finish, and the name doeskin is applied. It is often the effect and the kid-glove handle due to the finish that cause such a fabric to be placed in the category of a doeskin. The fabric is all wool, often all merino, or possibly blended wool including merino.

Doeskin Finish

A soft low nap that is brushed in one direction. Cloth with this type of finish is used on billiard tables and in men’s wear.

Doff

A set of full bobbins produced by one machine (a roving frame a spinning frame or a manufactured filament-yarn extrusion machine).

Doffer

1. A wire-covered cylinder used for the removal of fibres from the main cylinder of a card. (See also cylinder and carding.)
Note: The fibres are condensed on to the doffer to form a card web.
2. A person who, or mechanism which, removes packages or material from a textile machine used in yam manufacture.

Doffer Comb

A reciprocating comb the teeth of which oscillate close to the card clothing of the doffer to strip the web of fibers from the card.

Doffer Loading

Fibers imbedded so deeply into the doffer wire clothing that the doffer comb cannot dislodge them to form a traveling web.

Doffing

1. The removal of material or packages from a textile machine.
2. The replacement of full spinning packages with empty spinning tubes (cops). This can be performed automatically by the use of automatic doffing units.

Doffing tube (rotor spinning)

An extension to the navel to guide the withdrawn yarn from the rotor. (See alsorotor spinning.)

Dog-legged selvedge

A selvedge that varies in width. This Should not be confused with distorted selvedge (see selvedge, distorted).
Note: Variations in weft tension or lack of control of the warp ends within the selvedge may result in such unevenness. Pulled-in selvedges are caused by pulling-in of the edges by isolated tight picks; dog-legged selvedges are the result of the characteristic gradual change in weft tension that occurs as some types of weft pim are unwound (seecop-end effect), regular changes in selvedge width being present at each pirn change.

Dogstooth check

A small colour-and-weaive effect in a fabric produced by a combination of 2/2 twill weave and 4 and 4 order of colouring in warp and weft. (See also shepherd's-cheek effect.)

Dogstooth check

A small colour-and-weaive effect in a fabric produced by a combination of 2/2 twill weave and 4 and 4 order of colouring in warp and weft. (See also shepherd's-cheek effect.)

Dollv

1. A machine in which fabric pieces sewn end to end are circulated repeatedly through a liquor by means of a single pair of squeeze rollers and a drawing-off roller above the liquor.
2. A machine, also known as a 'tom-tom', in which lace, hosiery, or knitwear are subjected to the action of free-falling beaters while immersed in a detergent solution and carried in a moving trough.