Drying
Following on the washing comes the final operation of the dyeing
process, that of drying the dyed and washed goods. Now textile fabrics
of all kinds after they have passed through dye-baths, washing
machines, etc., contain a large amount of water, often exceeding in
amount that of the fabric itself, and to take the goods direct from
the preceding operations to the drying plant means that a considerable
amount of fuel m
water. It is therefore very desirable that the goods be freed from as
much of this water as possible before they are sent into any drying
chambers, and this may be done in three ways, by wringing, squeezing
and hydro-extracting. The first two methods have already been
described (pp. 198, 199) and need not again be alluded to, the last
needs some account.
Hydro-extractors are a most efficient means for extracting water
out of textile fabrics. They are made in a variety of forms by several
makers. Essentially they consist of a cylindrical vessel with
perforated sides, so constructed that it can be revolved at a high
speed. This vessel is enclosed in an outer cage. The goods are placed
in the basket, as it is termed, and then this is caused to revolve; at
the high speed at which it revolves centrifugal action comes into play
and the water contained in the goods finds its way to the outside of
the basket through the perforations and so away from the goods.
Hydro-extractors are made in a variety of sizes and forms, in some the
driving gear is above, in others below the basket, in some the driving
is done by belt gearing, in others a steam engine is directly
connected with the basket. Figures 29 and 30 show two forms which are
much in use in the textile industry. They are very efficient and
extract water from textile goods more completely than any other means,
as will be obvious from a study of the table below.
The relative efficiency of the three systems of extracting the
moisture out of textile fabrics has been investigated by Grothe, who
gives in his Appretur der Gewebe, published in 1882, the following
table showing the percentage amount of water removed in fifteen
minutes:--
Yarns. Wool. Silk. Cotton. Linen. (p. 208)
Wringing 44.5 45.4 45.3 50.3
Squeezing 60.0 71.4 60.0 73.6
Hydro-extracting 83.5 77 81.2 82.8
Pieces.
Wringing 33.4 44.5 44.5 54.6
Squeezing 64.0 69.7 72.2 83.0
Hydro-extracting 77.8 75.5 82.3 86.0
In the practical working of hydro-extractors it is of the utmost
importance that the goods be carefully and regularly laid in the
basket, not too much in one part and too little in another. Any
unevenness in this respect at the speed at which they are driven
leaves such a strain on the bearings as to seriously endanger the
safety of the machine.
After being wrung, squeezed or hydro-extracted the goods are ready to
be dried. In the case of yarns this may be done in rooms heated by
steam pipes placed on the floor, the hanks being hung on rods
suspended from racks arranged for the purpose.
Where large quantities of yarn have to be dried it is most economical
to employ a yarn or drying machine, and one form of such is shown in
figure 31. The appearance of the machine is that of one long room from
the outside, internally it is divided into compartments, each of which
is heated up by suitably arranged steam pipes, but the degree of
heating in each compartment varies, at the entrance end it is (p. 209)
high, at the exit end low. The yarn is fed in at one end, being
hung on rods, and by suitable gearing it is carried directly through
the various chambers or sections, and in its passage the heat to which
it is subject drives off the water it contains. The yarn requires no
attention from the time it passes in wet at the one end of the (p. 210)
machine and comes out dry at the other end. The amount of labour
required is slight, only that represented by filling the sticks with
wet yarn and emptying the dried yarn. The machine works regularly and
well.
The drying is accomplished by circulating heated air through the
yarns, this heating being effected by steam coils; fresh air
continually enters the chambers while water-saturated air is as
continually being taken out at the top of the chamber. One of the
great secrets in all drying operations is to have a constant current
of fresh hot air playing on the goods to be dried, this absorbs the
moisture they contain, and the water-charged air thus produced must be
taken away as quickly as possible.
#Piece Goods.#--The most convenient manner of drying piece goods is to
employ the steam cylinder drying machine such as is shown in figure
32. This consists of a number of hollow tin or copper cylinders which
can be heated by steam passing in through the axles of the cylinders,
which are made hollow on purpose. The cloth to be dried passes round
these cylinders, which revolve while the cloth passes. They work very
effectually.
More
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Alder Bark
The bark and twigs of alder are used for dyeing brown and black. For 1 lb. wool use 1 lb. alder bark. Boil the wool with it for 2 hours, when it should be a dull reddish brown. Add 1/2 oz. copper as for every pound of wool for black. ... Alum
This is the most generally used of all the mordants, and has been known as such from early times in many parts of the world. For most colours a certain proportion of cream of tartar should be added to the alum bath as it helps to brighten the ultima... Appendix
=Testing Textile Fabrics.= This is an age of adulteration, and next to food there is probably no commodity that is adulterated as much as the clothing we wear. Large purchasers of textile fabrics and various administrative bodies, such as army clo... Artificial Silk
=Silk Cotton.= On account of the high price of silk various attempts have been made to find satisfactory substitutes for it. There are certain seed coverings of plants that contain very fine hair-like fibers with a luster almost equal to silk, but... Barberry
The roots and bark of Berberis Vulgaris is used principally for silk dyeing, without a mordant. The silk is worked at 50 deg. to 60 deg.C. in a solution of the dye wood slightly acidified with sulphuric, acetic or tartaric acid. For dark shades mord... Blue Shades On Wool
There are a very large number of blue artificial dyes of every class, but only a few natural ones, indigo and logwood, and with these every imaginable tint and shade of blue from the palest sky tints to the darkest navy blue or blue black can be pro... Boiling Out
Before dyeing cotton in the raw state, or in yarn spun direct from the raw state, it must be boiled for several hours to extract its natural impurities. For dark colours water alone may be used, but for light and bright colours a weak solution of ca... Brazil Woods
Various leguminous trees, including lima, sapan and peach wood, dye red with alum and tartar, and a purplish slate colour with bichromate of potash. Some old dyers use Brazil wood to heighten the red of madder. CAMWOOD, BARWOOD, SANDALWOOD, or SA... British Dye Plants
On the introduction of foreign dye woods and other dyes during the 17th and 18th centuries, the native dye plants were rapidly displaced, except in some out of the way places such as the Highlands and parts of Ireland. Some of these British dye pl... Brown Shades On Wool
Brown is a very important colour, of which there is an infinite variety of shades and it can be dyed in a great variety of ways and from a variety of dye-stuffs, as will be seen on looking through the recipes which follow, although these do not by a... Catechu
Catechu (Cutch) is an old Indian dye for cotton. It can also be used for wool and silk, and gives a fine rich brown. It is obtained from the wood of various species of Areca, Acacia and Mimosa trees. Bombay Catechu is considered best for dyeing purp... Catechu Brown
The wool is boiled for 1 to 1-1/2 hours, with 10 to 20 per cent catechu, then sadden with 2 to 4 per cent of copper sulphate, ferrous sulphate, or chrome, at 100 deg.C., in a separate bath for 1/2 hour. ... Chrome
(Potassium dichromate. Bichromate of Potash.) Chrome is a modern mordant, unknown to the dyer of fifty years ago. It is excellent for wool and is easy to use and very effective in its action. Its great advantage is that it leaves the wool soft to ... Cochineal
The dried red bodies of an insect (Coccus Cacti) found in Mexico are named Cochineal. (1). PURPLE, CRIMSON AND SCARLET (For 1 lb. wool.) Mordant with Bichromate of Potash (3%). Dye for 1 to 2 hours with 3 oz. to 6 oz. cochineal. With alum morda... Copper
(Copper Sulphate, Verdigris, Blue Vitriol, Blue Copperas, Bluestone.) Copper is rarely used as a mordant. It is usually applied as a saddening agent, that is, the wool is dyed first, and the mordant applied afterwards to fix the colour. With crea... Cotton
Cotton is the down surrounding the seeds in pods of certain shrubs and trees growing in tropical and semi-tropical countries. First introduced into Europe by the Saracens, it was manufactured into cloth in Spain in the early 13th century. Cotton clo... Cotton
=Cotton.= Cotton is the most important vegetable fiber used in spinning. The cotton fiber is a soft, downy substance which grows around the cotton seed. When examined under the microscope it appears as a long twisted cell. Owing to the fact that t... Cotton Fabrics
=Albatross.= Cotton albatross cloth is a fabric made in imitation of a worsted fabric of the same name. It has a fleecy surface. The name is taken from the bird whose downy breast the finish of the fabric resembles. The warp is usually 28s cotton,... Drying
Following on the washing comes the final operation of the dyeing process, that of drying the dyed and washed goods. Now textile fabrics of all kinds after they have passed through dye-baths, washing machines, etc., contain a large amount of water, o... Dyeing And Finishing
=Dyeing.= When a fabric or fiber is impregnated with a uniform color over its whole surface, it is said to be "simply dyed." On the other hand, if distinct patterns or designs in one or more colors have been impressed upon a fabric, it is called p... Dyeing Machinery And Dyeing Manipulations
Wool is dyed in a variety of forms, raw, loose wool; partly manufactured fibre in the form of slubbing or sliver; spun fibres or yarns, in hanks or skeins and in warps, and lastly in the form of woven pieces. These different forms necessitate the ... Dyeing Machines
Dye-tubs and vats, such as those described above, have been largely superseded by machines in which the handling or working of the materials being dyed is effected by mechanical means. There have been a large number of dyeing machines invented, some... Dyeing Of Gloria
Gloria is a material which during the last few years has become of considerable importance as furnishing a fine lustrous fabric at a comparatively low price. The perfection to which the art of dyeing has attained and the facilities now available t... Dyeing Union (mixed Cotton And Wool) Fabrics
There is now produced a great variety of textile fabrics of every conceivable texture by combining the two fibres, cotton and wool, in a number of ways. The variety of these fabrics has of late years considerably increased, which increase may be l... Dyer's Broom
Genista Tinctoria. The plant grows on waste ground. It should be picked in June or July and dried. It can be used with an alum and tartar mordant and gives a good bright yellow. It is called greening weed and used to be much used for greening blue w... Experimental Dyeing And Comparative Dye Testing
Every dyer ought to be able to make experiments in the mordanting and dyeing of textile fibres for the purpose of ascertaining the best methods of applying mordants or dye-stuffs, the best methods of obtaining any desired shade, and for the purpos... 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 c... Flax
=Flax.= Flax or linen occupies the first position in the group of stem fibers,[18] being not only the oldest, but next to cotton the most important vegetable spinning material known. Its value is increased by the fact that the flax plant readily a... Green
Green results from the mixing of blue and yellow in varying proportions according to the shade of colour required. Every dyer has his particular yellow weed with which he greens his blue dyed stuff. But the best greens are undoubtedly got from w... Green Shades On Wool
Of green shades there is an infinite variety, and these can be dyed in several ways. Either a simple green dye-stuff may be used or mixtures of blue and yellow dye-stuffs may be employed, this latter method being extremely common. It is somewhat int... Heather
Most of the heathers make a yellow dye, but the one chiefly used is the Ling, Calluna vulgaris. The tips are gathered just before flowering. They are boiled in water for about half-an-hour. The wool, previously mordanted with alum or chrome accordin... Hemp
=Hemp= is a fiber that is obtained from the hemp plant. It grows principally in Russia, Poland, France, Italy, Asia, India, the Philippines, Japan, and some parts of the United States--Kentucky, Missouri, Tennessee, Ohio, Indiana, and New York. Th... History Of Lace
Lace, like porcelain, stained glass, and other artistic things, has always been an object of interest to all classes. Special patterns of laces date from the sixteenth century. The church and court have always encouraged its production. While the ea... History Of Manufacturing
=Spinning.= Spinning and weaving are two of the earliest arts practised by man. Yarn for the making of cloth was spun in the earliest times by the use of the distaff and spindle. The spindle was a round stick of wood a foot or less in length, taperi... History Of Textiles
The three fundamental industries that have developed from necessity are the feeding, sheltering, and clothing of the human race. These primary wants were first gratified before such conveniences as transportation and various lines of manufacture wer... History Of The Organization Of Textile Industries
The development of the textile industry may be divided into four stages or periods: first, the family system; second, the guild system; third, the domestic system; and fourth, the factory system. =The Family System.= Under the family system the wo... Hydrosulphite-soda Vat For Wool
2 ozs. powdered indigo. 7 fluid ozs. Caustic Soda solution (SG 1.2). 4 pints Sodium Hydrosulphite (SG 1.1). The Stock Solution.--Take 2 ozs. of well pounded indigo, with enough warm water (120 deg.F.) to make a paste, and grind in a pestle and m... Indigo
Indigo is the blue matter extracted from a plant Indigofera tinctoria and other species, growing in Asia, South America and Egypt. It reaches the market in a fine powder, which is insoluble in water. There are two ways of dyeing with Indigo. It may ... Indigo Extract 4 To 6 Lbs Wool
Mordant[E] 25% Alum. Stir 2 to 3 ozs. Indigo extract into the water of dye bath. The amount is determined by the depth of shade required. When warm, enter the wool and bring slowly to boiling point (about 1/2 an hour) and continue boiling for anothe... Indigo Vat Tin For Wool
To 2 quarts of water add 1/4 lb. lime, and make hot. Then add 1 oz. indigo pounded up with a little of the lime water; let it stand and get warmer. Pound up 1/2 oz. tin, Stannous Chloride, in a little lime water and add, together with 1/2 oz. zinc. ... Iron
(Ferrous Sulphate, copperas, green vitriol.) Iron is one of the oldest mordants known and is largely used in wool and cotton dyeing. It is almost as important as alum. The temperature of the mordanting bath must be raised very gradually to boiling... Kermes
Kermes, or Kerms, from which is got the "Scarlet of Grain" of the old dyers, is one of the old insect dyes. It is considered by most dyers to be the first of the red dyes, being more permanent than cochineal and brighter than madder. In the 10th cen... Knitting
The art and process of forming fabrics by looping a single thread, either by hand with slender wires or by means of a machine provided with hooked needles, is called knitting. Crocheting is an analogous art, but differs from knitting in the fact t... Lace
=Lace.= Lace is the name applied to an ornamental open work of threads of flax, cotton, silk, gold, or silver, and occasionally of mohair or aloe fiber. The latter are used by the peasants of Italy and Spain. Lace consists of two parts, the grou... Lace Terms Defined
Alencon (Point d').--Fine needlepoint lace with the ground of double-twist thread in a semi-net effect. Is usually worked with horsehair on the edges to give firmness to the cordonnet. Called after the city in France where it is... Light Grey
(For 6 lbs.) 1 oz. cutch, 1 oz. iron. Boil for 1/2 an hour in the cutch, then put into boiling iron, being very careful to stir well. Wash very thoroughly. These proportions can be varied according to the shade of grey required; the more iron mak... Linen
Linen is flax, derived from the decomposed stalks of a plant of the genus Linum. It grows chiefly in Russia, Belgium, France, Holland and Ireland. The plants after being gathered are subjected to a process called "retting" which separates the fib... List Of Lichens Used By The Peasantry Of Different Countries For Wool Dyeing
SHADES OF RED, PURPLE AND ORANGE Borrera ashney. Chutcheleera. India. Conicularia aculeata. var. spadicea. Brown prickly cornicularia. Canary Islands, Highland Mountains. Evernia prunastri. Ragged hoary Lichen. Stag's horn... Logwood
(Bois de Campeche, Campeachy Wood) Logwood is a dye wood from Central America, used for producing blues and purples on wool, black on cotton and wool, and black and violet on silk. It is called by old dyers one of the Lesser Dyes, because the col... Madder
Madder consists of the ground-up dried roots of a plant Rubia tinctorum, cultivated in France, Holland and other parts of Europe, as well as in India. Madder is one of the best and fastest dyes. It is used also in combination with other dyes to prod... Manufacture Of Cotton Yarn
=Picker Room.= The first step in the conversion of the bale of cotton into yarn consists in giving the cotton fibers a thorough cleaning. This is accomplished by feeding the cotton to a series of picker machines called in order, bale breaker, co... Mode Colours On Wool
Under the general designation of mode colours are included a great variety of tints or shades unusually described more specifically (p. 165) as drabs, buffs, greys, fawns, slates, etc. It is impossible here to do more than give a few recipes for t... Mordants
Any dye belongs to one of two classes. Substantive, giving colouring directly to the material: and adjective, which includes the greater number of dyes and requires the use of a mordant to bring out the colour. There are thus two processes conc... Mordants
Alum. Alum (1/4 weight of cotton) is dissolved in hot water with carbonate of soda crystals, or other alkali (1/4 weight of alum); work cotton in the solution, steep for several hours or overnight. Then well wash. Aluminium acetate solution as for s...