Textiles.

by William H. Dooley.

PREFACE

The author established and since its inception has been in charge of the first industrial school for boys and girls in Ma.s.sachusetts. At an early date he recognized the need of special text-books to meet the demand of young people who are attending vocational schools. There are plenty of books written on textiles for technical school students and advanced workers. But the author has failed to find a book explaining the manufacture and testing of textiles for commercial, industrial, domestic arts, and continuation schools, and for those who have just entered the textile or allied trades. This book is written to meet this educational need. Others may find the book of interest, particularly the chapters describing cotton, woolen, worsted, and silk fabrics.

The author is under obligations to Mr. Franklin W. Hobbs, treasurer of the Arlington Mills, for permission to use ill.u.s.trations and information from literature published by the Arlington Mills; to Mr.

S. H. Ditchett, editor of _Dry Goods Economist_, for permission to use information from his publication, "Dry Goods Encyclopedia"; to the editor of the _Textile Mercury_; to Frank P. Bennett, of the _American Wool and Cotton Reporter_, for permission to use information from "Cotton Fabrics Glossary"; and to the instructors of the Lawrence Industrial School for valuable information. In addition, information has been obtained from the great body of textile literature, which the author desires to acknowledge.

TEXTILES

CHAPTER I

FIBERS

All the materials used in the manufacture of clothing are called _textiles_ and are made of either long or short fibers. These fibers can be made into a continuous thread. When two different sets of threads are interlaced, the resulting product is called cloth.

The value of any fiber for textile purposes depends entirely upon the possession of such qualities as firmness, length, curl, softness, elasticity, etc., which adapt it for spinning. The number of fibers that possess these qualities is small, and may be cla.s.sified as follows:

_Animal Fibers:_ Wool, Silk, Mohair.

_Vegetable Fibers:_ Cotton, Flax, Jute, Hemp, etc.

_Mineral Fibers:_ Asbestos, Tinsel, and other metallic fibers.

_Remanufactured Material:_ Noils, Mungo, Shoddy, Extract, and Flocks.

_Artificial Fibers:_ Spun Gla.s.s, Artificial Silk, and Slag Wool.

=The Structure of Wool.= A large part of the people of the world have always used wool for their clothing. Wool is the soft, curly covering which forms the fleecy coat of the sheep and similar animals, such as the goat and alpaca. Wool fiber when viewed under the microscope is seen to consist roughly of three parts:

1st. Epidermis, or outer surface, which is a series of scales lying one upon the other.

2d. Cortex, or intermediate substance, consisting of angular, elongated cells, which give strength to the wool.

3d. Medulla, or pith of the fiber.

[Ill.u.s.tration: WOOL FIBER

Highly magnified]

=Difference between Wool and Hair.= Not all animal fibers are alike.

They vary in fineness, softness, length, and strength, from the finest Merino wool to the rigid bristles of the wild boar. At just what point it can be said that the animal fiber ceases to be wool and becomes hair, is difficult to determine, because there is a gradual and imperceptible gradation from wool to hair.[1] The distinction between wool and hair lies chiefly in the great fineness, softness, and wavy delicacy of the woolen fiber, combined with its highly serrated surface--upon which the l.u.s.ter of the wool depends.

=Characteristics of Wool.= The chief characteristic of wool is its felting or shrinking power. This felting property from which wool derives much of its value, and which is its special distinction from hair, depends in part upon the kinks in the fiber, but mainly upon the scales with which the fiber is covered. These scales or points are exceedingly minute, ranging from about 1,100 to the inch to nearly 3,000. The stem of the fiber itself is extremely slender, being less than one thousandth of an inch in diameter. In good felting wools the scales are more perfect and numerous, while inferior wools generally possess fewer serrations, and are less perfect in structure.

In the process of felting the fibers become entangled with one another, and the little projecting scales hook into one another and hold the fibers closely interlocked. The deeper these scales fit into one another the closer becomes the structure of the thread.

=Cla.s.sification of Wool.= The various kinds of wool used in commerce are named either from the breed of the sheep or from the country or locality in which the sheep are reared. Thus we get Merino wool from Merino sheep, while English, American, and Australian wools are named from the respective countries. As the result of cross breeding of different sheep in different parts of the world, under different climatic conditions, physical surroundings, and soil, there exist a great many varieties of wool. The wool of commerce is divided into three great cla.s.ses: (1) Short wool or clothing wool (also called carding wool), seldom exceeding a length of two to four inches; (2) long wool or combing wool, varying from four to ten inches; (3) carpet and knitting wools, which are long, strong, and very coa.r.s.e.

The distinction between clothing or carding wools on the one hand, and combing wools on the other, is an old one. Combing wools are so called because they are prepared for spinning[2] into yarn by the process of "combing"--that is, the fibers are made to lie parallel with one another preparatory to being spun into thread. Carding wools--made to cross and interlace and interlock with one another--are shorter than combing wools, and in addition they possess to a much greater degree the power of felting--that is, of matting together in a close compact ma.s.s. Combing wools, on the other hand, are not only longer than the carding wools, but they are also harder, more wiry, and less inclined to be spiral or kinky. It must be understood, however, that under the present methods of manufacture, short wools may be combed and spun by the French method of spinning just as the long wools are combed and spun by the Bradford or English system.

Carpet and knitting wools are the cheapest, coa.r.s.est, and harshest sorts of wools. They come princ.i.p.ally from Russia, Turkey, China, Greece, Peru, Chili, etc., and from the mountain districts of England and Scotland. Carpet wools approach more nearly to hair than other wools. The only staple of this cla.s.s produced in the United States is grown on the original Mexican sheep of the great Southwest. Few of these Mexican sheep are left, for they have been improved by cross breeding, but they const.i.tute the foundation stock of most of our Western flocks, which now produce superior clothing and combing wool.

=Sheep Shearing.= In order to get an idea of the importance of the sheep industry in the United States, one must take a glance at its condition in the big states of the West. Wyoming has more than 4,600,000 sheep within its borders. Montana, which held the record until 1909, has 4,500,000 sheep. Then comes Idaho with 2,500,000, Oregon with 2,000,000, and so on down the list until the nation's total reaches 40,000,000 sheep, four-fifths of which are west of the Missouri river.

[Ill.u.s.tration: SHEEP SHEARING]

To harvest the wool from such an enormous number of backs is a task that calls for expert shearers, men who can handle the big shears of the machine clippers with a skill that comes from long practise. The shearing must be done at the right time of the year. If the wool is clipped too early, the sheep suffer from the cold; if the shearing comes too late, the sheep suffer from intense heat, and in either case are bound to lose weight and value.

To meet the exacting conditions a cla.s.s of men has risen expert in the sheep-shearing business. These shearers begin work in southern and middle California, Utah, etc. Another month finds them busy in the great sheep states of Wyoming, Montana, Idaho, and Oregon, where they find steady employment until July, when they go to the ranges of Canada. In this way the shearers keep busy nearly all the year, and at high wages.

The Mexicans are particularly expert with the hand shears, though this form of clipping is being done away with, owing to the installation of power plants for machine shearing. These plants are installed at various points on the great sheep ranges. Long sheds are erected and shafting extends down both sides of the shearing place. Twenty or more shearers will be lined up in one of these sheds, each man operating a clipping machine connected with the shafting. The sheep are brought in from the range in bands of 2,500 or more, and are put in the corrals adjoining the shearing sheds. Then they are driven down chutes to the shearers.

A shearer reaches into a small corral behind him and pulls out a sheep. With a dexterous fling the animal is put in a sitting posture between the shearer's knees, and then the steel clippers begin clipping off the wool. The machine-shearing saves much wool, as it gets closer to the skin of the sheep and shears more evenly. In fact, some sheep owners say that the increased weight of their fleeces at each shearing is enough to pay the extra expense of running a power plant.

As fast as the sheep are turned out by the shearers they are run along a narrow chute and each one is branded. The branding mark is usually a letter painted on the back of the sheep so that it can be plainly seen when they are coming through a chute. The mark remains on the fleece and is always easily distinguished.

=Fleece.= There is a great variation in the weight of fleeces. Some sheep, such as those on the best ranges in Oregon, Montana, and Wyoming, will average an eight-pound fleece full of natural oil, while sheep from the more sterile alkaline ranges of New Mexico will not average much more than five pounds of wool.

The shearing season on the plains is much like the threshing season in agricultural communities. With a crew of first-cla.s.s shearers working in a shearing shed, it is not long until the floor is a sea of wool.

Boys are kept busy picking up the fleeces, tying them into compact bundles, and throwing them to the men who have been a.s.signed to the task of filling the wool sacks. These sacks, which hold about 400 pounds, are suspended from a wooden framework, and as fast as the fleeces are thrown in, they are tramped down until the sacks will not hold a pound more. Most of the sacks are shipped to warehouses in such wool centers as Casper, Wyoming, or Billings, Montana, the latter place being the greatest wool shipping center in the world. Here they are sold to Eastern buyers, who examine the clips at their leisure and make their bids.

=Value of Wool Business.= Some idea of the fortunes at stake in the wool business can be gathered from the fact that the total wool product of the country in 1909 was valued at $78,263,165. It is expected that the returns from the wool clip in a fairly good year will pay all a sheepman's running expenses, such as hire of herders, cost of shearing, etc. He then has the sale of his lambs as clear profit. Enormous fortunes are being made in the sheep business in the west, owing to the high price of wool and mutton.

=Saxony and Silesian Wool.= Among wools of all cla.s.ses the Saxony and Silesian take the first place, and for general good qualities, fineness, and regularity of fiber, they are unequalled. The fiber is short in staple, possesses good felting properties, and is strong and elastic. This wool is used chiefly in the manufacture of cloths where much milling[3] is required, such as superfines and dress-faced fabrics.

=Australian Wools.= Australia furnishes wools of a superior character, and some of the choicest clips rival the Saxony and Silesian wools.

They are used both for worsted[4] and woolen yarns. They are generally strong and of an elastic character, possess numerous serrations, and are of good color, with good felting properties. The princ.i.p.al Australian wools are Port Philip, Sydney, and Adelaide wools. These are the best brands imported from that country.

=Port Philip Wool.= Port Philip wool is suitable for either worsted or woolen yarns. The fiber is not quite as fine as Saxony, but it makes a good thread, is fairly sound in staple, and is of good length and color. It is very wavy and serrated. The longest and best of this wool is used for the very finest worsted yarns, and will spin up to 130's counts.[5] The sheep are descendants of the original Spanish Merino.

Cross bred Port Philip wool is from the same Merino sheep crossed with Leicesters, which yield a medium quality fleece of sound fiber and good quality for spinning counts from 40's to 56's. The yarn has a bright, clear appearance.

=Sydney Wools.= Sydney wools are moderately fine in fiber and of medium length. They are rather deficient in strength, uneven in color, and often contain yellow locks which make them undesirable when required for dyeing light shades. They are used for nearly the same purpose as Port Philip wools, but do not spin quite as far in worsted yarns, nor are they equal in milling qualities.

=Adelaide Wool.= Adelaide wool has a reputation for sound Merinos, the average quality being a little lower than for the Port Philip and Sydney wools. Its fiber is moderately fine, but not of uniform length; its color is not so good, and it contains a large amount of yolk.[6]

Adelaide wool is used for worsted dress goods, weft (filling)[7] yarn up to 60's, and certain worsted warps.[7] It is used for medium fancy woolens.

=Van Wool from Tasmania.= The climate of this island is well suited to the growing of wool, and produces excellent qualities, fine in fiber, of good length, and strong in the staple, which will spin as high counts as 70's and 80's worsted. This wool is useful for mixing with other good wools. Its color is very white, which makes it a useful wool for dyeing light shades. Its milling properties are good, and the shorter sorts are suitable for woolens.

=New Zealand Wools= are very supple, which make them valuable to the spinner. These wools are suitable for almost all cla.s.ses of Merino and crossbred yarns. They are of good length, sound staple, have good felting properties, and are of good color. They are useful for blending with mungo and shoddy, to give to these remanufactured materials that springy, bulky character which they lack.

=Cape Wools.= Cape Colony and Natal produce merino wool that is somewhat short in staple, rather tender, and less wavy than some other wools. The sheep are not so well cared for, and are fed on the leaves of a small shrub. The absence of gra.s.s leaves the ground very sandy, and this makes the fleece heavy and dirty. Its color is fair, but it lacks elasticity. It is used chiefly to cheapen blends[8] of 60's top.[9] The short wool is combed for thick counts for weft and hosiery, and is also used for shawls and cloths where felting is not an essential feature.

[Ill.u.s.tration: MERINO SHEEP]