Chilkat weaving

Chilkat weaving is a traditional form of weaving practiced by Tlingit, Haida, Tsimshian, and other Northwest coastal tribes of Alaska and British Columbia. Chilkat blankets are worn by high-ranking tribal members on civic or ceremonial occasions, including dances.

Background of Chilkat Weaving

The name derives from the Chilkat tribe in Klukwan, Alaska on the Chilkat River. The Tsimshian might have invented the technique. Chilkat weaving can be applied to blankets, robes, dance tunics, aprons, leggings, shirts, vests, bags, hats, and wall-hangings. Chilkat clothing features long wool fringe that sways when the wearer dances. Traditionally chiefs would wear Chilkat blankets during potlatch ceremonies.

Chilkat weaving is one of the most complex weaving techniques in the world. It is unique in that the artist can create curvilinear and circular forms within the weave itself. A Chilkat blanket can take a year to weave. Traditionally mountain goat wool, dog fur, and yellow cedar bark are used in Chilkat weaving. Today sheep wool might be used. The designs used Northwest Coast formlines, a traditional aesthetic language made up of ovoid, U-form, and S-form elements to created highly stylized, but representational, clan crests and figures from oral history - often animals and especially their facial features. Yellow and black are dominant colors in the weavings, as is the natural buff color of the undyed wool. Blue can be an secondary color. Looms used in Chilkat weaving only have a top frame and vertical supports, with no bottom frame, so the warp threads hang freely. The weaver works in vertical sections, as opposed to moving horizontally from end to end.

Limitations of Shuttle Looms

Despite the relatively high speed and efficiencies in loom with conventional picking, productivity of these machines will continue to be limited as long as their fundamental constructions involved the use of a shuttle propulsion. Vincent has shown that the power required for picking is proportional to the cube of the loom speed. If the loom speed is increased from 200 to 300 picks per minute, the power requirement would increase by a factor of (3/2)3 i.e. 3.4 times approximately. This results in following disadvantages

• Greater strain imposed on the picking mechanism, thus rendering it liable to frequent failure.

• Greater amount of noise and vibration.

• Because of superior energy in shuttle, greater strain is again imposed on the checking mechanism.

• The movement of shuttle will be more difficult to control and there will be a greater possibility of its ejection from the loom.

The dynamic problems created by the picking and checking mechanism and the inherent process of pirn winding for shuttle looms had encouraged the loom makers to develop alternative means of weft insertion in which heavy shuttle is not projected forwards and backwards across the width of the loom. It is customary to refer these looms as shuttleless looms. The various shuttleless loom that have been developed over a period of about 50 years can be classified into various groups.

• Projectile Looms

• Rapier Looms

• Fluid Jet Looms

• Multiphase Looms

Developments in Automatic Looms

Traditional looms then were stopped every few minutes in order to replace the empty weft pirns or cop in the shuttle and this limited the number of looms, a weaver could operate to about four. James Northrop, an English man who emigrated to America and worked for the Draper Corporation, completed an automatic weft transfer system which replaced the weft pirn in the shuttle without slowing or stopping the loom in 1889. This mechanism enabled the weaver to tend 16 looms. The Northrop Automatic looms quickly came to use in America, so that by 1930, 90% of the American looms were automatic compared with only 5% in Britain. Similar developments took place elsewhere also, Ruti, a major loom maker of Switzerland manufactured automatic bobbin changing Northrop loom in 1898. In Japan also, Toyoda, Sakamoto, Tsudakoma, etc also developed shuttle looms with automatic weft transfer. After World War II, more productivity and efficiency were essential to overcome increasing labour costs in Western countries. It was also realised that more productivity is the key to reducing manufacturing costs of the loom. All attempts were concentrated to studying various factors affecting speed of the loom and the loom with higher speed were made available.

Development of Handlooms

It is still not certain when the weaving process was introduced to human society. It is clear from many historical records that weaving originated long before the time of Jesus Christ. Except few activities else where, the major developments in textile took place in England. In England the major shift from agriculture to woolen industry came in the 14th century. During all these years and a few hundred years after 14th century, the cloth was produced on hand-looms which were not equipped with fly shuttle. Prior to Industrial Revolution, woven fabrics was produced by atleast two people employed on loom.

In 1733, John Kay invented the fly shuttle which enabled weft to be inserted more rapidly. John Kay, a weaver, further incorporated a mechanism with which, a weaver could sit at the centre of the loom and merely pull the handle to make the shuttle move from one end of the fabric to insert a weft thread.
As a result of increased weaving speed, the hand spinning method of yarn production could not meet the requirement of fly shuttle looms and subsequently the mechanical spinning also developed rapidly in Britain with Hargreave's spinning Jenny (1770), Ark Writh's spinning machine (1769) and cromption spinning mule (1779). The development of the mechanical spinning system induced further developments in the loom. Edmund Cart Wright, an English clergy man, invented a so called powerloom which could be operated from a single point by two strong man.