5. Taking-up, or winding upon a roller the cloth as it is manufactured.
In addition to these primary operations, the loom has attachments for performing several other functions, such as stop-motions for stopping the loom when warp or filling threads break, or when the shuttle fails to cross the loom completely; temples for holding out the cloth laterally as the weaving proceeds; a mechanism--in the most modern looms--for changing the shuttles, or the cops in the shuttles, as the weft thread on the cops becomes exhausted, etc.
[Ill.u.s.tration: _Diagram of ring spindle_]
The modern cotton loom, which automatically removes the filling bobbins without stopping the loom, is rapidly displacing the older types, and one weaver can now attend to a surprisingly large number of looms, being greatly a.s.sisted also by the automatic warp and filling "stop motions."
CHAPTER IX
The Finishing Operations
Following the manufacture of the cloth, come the operations necessary to prepare it for the market. These involve such treatments as bleaching, printing, mercerizing, dyeing, and finishing (in the narrow sense).
The number of machines involved in these various processes rivals the number which are used in the actual spinning and weaving operations.
Modern bleaching is a highly technical science, conceived and planned by engineers, and carried out with elaborate machinery by skilled workers.
Gray cloth, as it comes from the loom, is of an unattractive color, a dirty grayish yellow, and contains not only those impurities which it has picked up on its journey through the mill but those inherent in its natural state as well, all totalling some five per cent. more or less, of the total weight. In addition there may be numerous bits of leaf from the boll which have clung to the fibers through all the processing, and which appear finally in the cloth as little brownish specks, known to the trade as motes. Finally, there is the sizing which was put into the warp.
[Ill.u.s.tration: _Warping--The creel in the rear_]
Bleaching an Intricate Chemical Process
In the bleaching of cotton, there is a series of operations which have for their object the elimination of the waxy, fatty matters embodied in the fiber, as well as any dirt which it may have acquired. Then, there is the actual whitening and the bleaching of the cloth which destroys any coloring matter which it may contain and finally there are treatments designed to neutralize the effect of the chemicals used in the bleaching.
Thus, the sequence of treatments might be: first, boiling in plain water, which removes certain soluble substances; next, an extended boiling in a strong alkaline solution, which saponifies the waxy, fatty matters in the fiber, and thus removes them from the cloth or yarn. Third, a steeping in a bleaching solution--a solution of chloride of lime being largely employed for this purpose, and which treatment is known as the chemic.
Next, after another thorough washing there is a treatment in diluted sulphuric acid to neutralize the effects of the chemic, and finally this is followed again by another thorough washing with possibly an additional mild alkaline treatment. The nature and the method of all these treatments varies considerably, and depends upon the character of the goods being treated, but, at the conclusion, if all has gone well, the cloth should be a good white and should not be impaired in strength.
Singeing Necessary in Some Finishes
For a certain cla.s.s of goods, where a clean, smooth surface is required, it is desirable to singe the goods before the bleaching. This is accomplished by pa.s.sing the cloth, stretched out at full width, very rapidly over heated plates, or through gas flames, so that the fine hairs or fuzz are singed off, but the fabric itself has not had time to take fire. Both sides may be singed and the goods may be pa.s.sed more than once through the flame. When yarns are singed, the threads are pa.s.sed through the flame very rapidly, being unwound from one set of bobbins and wound up on another.
[Ill.u.s.tration: _Front view of an automatic loom_]
In the dyeing operation the cotton piece goods pa.s.s through a series of machines, the goods being in rope form as already explained, so that a number of pieces can be put into each machine, side by side. The wash boxes, dye vats, etc. are equipped with overhead rollers, by means of which the goods, which have been sewn end to end, so as to make a continuous string of them, pa.s.s out of the dye, over the roller and down into the bath on the other side, continuing to circulate around thus until the desired results have been obtained. In addition to the preparatory washing and boiling, mordanting and dyeing, there are subsequent washings to free the goods from loose coloring matter, and other special treatments are frequently accorded them.
Finishing in its special and restricted sense, implies a series of treatments, such as stretching, starching, dampening, drying, pressing, smoothing, l.u.s.treing, glazing, stiffening, softening, and whatnot, which are given to them according to the use to which they are to be put.
The printing press is constructed with a large main cylinder (D), the size being dictated by the number of colors which it must take care of.
As the printing operation is a continuous one, there must be a continuous feeding of the cloth, a continuous inking of the engraved rollers (C), and a continuous cleaning off of the unengraved surface after the inking.
Under each roller, where it is fixed in its place in the press, is a long copper trough or pan carrying the coloring material, and in the pan under the roller, and extending into the coloring matter, is an intermediate roller known as the "furnisher" roller, and, as the press revolves, this covers the surface of the copper roller with a heavy film of coloring.
The surplus coloring is sc.r.a.ped off as the roller revolves, by a long, sharp blade or knife, known as "the doctor," and after the roller pa.s.ses this it is quite clean, no coloring remaining on it except that in the engraved portion.
Each roller has its color pan with its own color in it. Then, as the cloth (A) pa.s.ses between the main cylinder, properly covered by suitable intervening materials and the series of rollers, each roller in turn prints its own color, and, collectively, the finished pattern is produced.
[Ill.u.s.tration: _Diagram of cloth printing machine_]
The goods then pa.s.s into a drying room and are afterwards introduced into a steaming chamber, where they are given a good steaming at a slight pressure. This steaming develops the colors and causes them to impregnate the fibers more thoroughly. Subsequently, for good work, the goods should be washed to get rid of the thickening matters that are mixed with the coloring, and then the printing appears in all its beauty.
Printing on Full Ground Colors
The foregoing briefly describes the processes of direct printing. In this case, the penetration of the colors to the opposite side of the goods is not very good. If a solid and full ground color is needed both on the face and back of the goods, it can be had either by the "Resist" or "Reserve" method, or by the "Extract" or "Discharge" method. In the "Resist" method, when a white figure is wanted on a black or colored ground, the goods are first printed with some substance which will resist the action of the dye stuffs. Then, when the goods are dyed, the treated part does not take the color and the substance used as a resist is washed out, and thus a white figure is obtained on a solid colored ground.
In the "Discharge" method, the goods are first dyed in a solid color, and are then treated with certain chemicals which destroy the dyed color wherever they touch the fabric, these chemicals being subsequently washed out where they have been applied, and thus again a white figure can be had in the colored ground. By the "Discharge" method, moreover, colored figures can also be printed on colored grounds, as certain colorings have been developed which are not affected by the discharge materials used, hence, a whole series of beautiful colors can be printed on goods previously dyed with black or colored grounds, each color being mixed with a suitable chemical for discharging the ground color, and thus the colors of the printed pattern come out as desired.
Another important process which is applied to both cotton yarn and cotton fabrics is that known as mercerization, called after "Mercer" an English chemist who introduced the process. Cotton when subjected to the action of strong, caustic alkali contracts violently, but when again stretched and straightened it is found to have acquired a distinct silkiness of appearance, and under the microscope the twisted ribbon-like fibers of the material--already referred to--will be found to have become straight, glossy and rodlike, just as a bicycle tire would appear after air was blown into it.
Cotton may be mercerized either in the yarn, warp, skein, or in the piece, the first being more effective. The best and most satisfactory results are achieved when the material treated is made of fine long staple cotton, either Sea Island or Egyptian, the shorter cottons being relatively much less improved by the treatment. The mercerizing does not diminish the strength of the material, and gives to it a greater affinity for dye stuffs.
Internal Organization of Cotton Mills
The foremen are specialists in their particular departments. The warehouseman, at one end, is a judge of cotton stock, and the foreman of the weaving room at the other knows how many automatic looms may safely be trusted to each weaver on his staff.
In between these two there are, according to the individual mill, a dozen or more other foremen, all reporting regularly to the superintendent, all captains of their own companies of workers, and all keen, in the interests of their own reputations, to operate their departments as intelligently, as efficiently, and with as little friction with their individual operators as possible. For it is generally recognized throughout the cotton industry that profitable business depends as much upon the whole-hearted cooperation of the wage-earners, as upon any other single factor.
The Question of Individual Efficiency
As for the operators themselves, they are so varied, there are so many problems which they have to face, and such difficulties which those who employ and direct them have to solve, that anything like adequate consideration is impossible. From the impersonal viewpoint, leaving out of account the human elements, the problems of wages, and the correlated problem of trade organization, there remains the question of individual efficiency. It is that which we have chiefly to consider.
[Ill.u.s.tration: _Inspecting finished cloth_]
The number of men, women, and children employed in the cotton mills of the country has increased at a very high rate, but there has been an interesting diminution in the proportionate percentage of women and children under sixteen years of age employed.
The United States Census of Manufacturers gives the following figures:
AVERAGE NUMBER OF EMPLOYES IN AMERICAN COTTON MILLS
_Men_ _Women_ _Children_ _Total_ 1870 42,790 69,637 22,942 135,369 1880 59,685 84,539 28,320 172,544 1890 88,837 106,607 23,432 218,876 1900 134,354 123,709 39,866 297,929 1910 190,531 141,728 38,861 371,120
In percentages these figures express themselves as follows:
_Men_ _Women_ _Children_ 1870 31.5 51.4 17.1 1880 34.6 49.0 16.4 1890 40.6 48.7 10.7 1900 45.1 41.5 13.4 1910 51.3 38.2 10.5
The question of nationality has had an important bearing upon the development of the industry in the United States. The constant influx into the country of successive waves of immigration from the different countries of Europe has often served in a decade to change the whole complexion of the labor question. In the original New England mills, the employees were of almost pure English stock. The sons and daughters of the Yankee farmers entered the mills, not as a permanent occupation, but merely as a means of getting a start in life.
Just before the Civil War, the Irish began to come rapidly, and the actual advent of that struggle saw a great number of the remaining natives leaving for the army, or thrown out of work. When the fighting was over they did not return, but the Irish came in even greater numbers.
The next decade saw the arrival of the French Canadians in the New England states, and there also came, in quick succession, natives of Italy, and of the various states of eastern Europe.
[Ill.u.s.tration: _Baled cloth being put aboard waiting freight cars_]