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Showing posts with label fibers. Show all posts
Showing posts with label fibers. Show all posts

Friday, 14 December 2018

What is textile designer?

Textile design is essentially the process of creating designs for woven, knitted or printed fabrics or surface ornamented fabrics. Textile designers are involved with the production of these designs, which are used, sometimes repetitively, in clothing and interior decor items.
The field encompasses the actual pattern making while supervising the production process. In other words, textile design is a process from the raw material into finished product. Fiber, yarn and finishes are the key elements to be considered during the textile design procedure.

Overview

Textile designing is a creative field that includes fashion design, carpet manufacturing and any other cloth-related field.Textile design fulfills a variety of purposes in our lives. For example, our clothing, carpets, drapes, towels, and rugs are all a result of textile design.
These examples illustrate the significance of textiles in our daily lives. The creations of textiles are not only important for their use, but also for the role they play in the fashion industry. Textile designers have the ability to inspire collections, trends, and styles. The textile industry, while being a creative art form, is a very business savvy industry.
Textile designers marry a creative vision of what a finished textile will look like with a deep understanding of the technical aspects of production and the properties of fiber, yarn, and dyes.
The creative process often begins with different art mediums to map concepts for the finished product. Traditionally, drawings of woven textile patterns were translated onto special forms of graph paper called point papers, which were used by the weavers in setting up their looms.
Today, most professional textile designers use some form of computer-aided design software created expressly for this purpose.Some of the latest advances in textile printing have been in the area of digital printing. The process is similar to the computer controlled paper printers used for office applications. In addition, heat-transfer printing is another popular printing method to be used in the textile design. Patterns are often designed in repeat to maintain a balanced design even when fabric is made into yardage. Repeat size is the distance directly across or down from any motif in a design to the next place that same motif occurs. The size of the repeat is determined by the production method. For example, printed repeat patterns must fit within particular screen sizes while woven repeat patterns must fit within certain loom sizes. There are several different types of layouts for repeated patterns. Some of the most common repeats are straight and half drop. Often, the same design is produced in many different colored versions, which are called colorways. Once a pattern is complete, the design process shifts to choosing the proper fabrics to get the design printed on or woven into the fabric
Designers might want to use the method of dyeing or printing to create their design. There are many printing methods.
  • Direct (Blotch) Printing
  • Overprinting
  • Discharge Printing
  • Resist Printing
  • Block Printing
  • Roller Printing
  • Screen Printing


So, what exactly does a textile designer do? Picture yourself working for a company that makes special novelty socks. They want their socks to sell better than anybody else's so they hire a textile designer (you) to make their socks the best. Not all textile designers get to choose the materials they work with, but this sock company has the time and money to invest in the best product possible, so they give their textile designers a lot of power. One of your first steps is to pick the materials used to create these socks. Socks need to be soft, thick enough for cushioning, lightweight enough for comfort, strong enough for prolonged use, and absorbent. So, you choose to avoid a fragile material like linen or a course material like hemp. Cotton is a good option, as are synthetic fabrics like polyester.
Textile designers that have control over this part of the process have a lot of decisions to make. Besides just picking the fabrics, they may also need to consider what fiber types, yarn sizes, or kinds of dyes will be used, as well as how those dyes will be applied. Are you going to print the design by hand or with a machine? Should the fabrics be bleached or left natural? Are any parts of the design going to be embroidered or sewn? There's a lot to think about.

Sunday, 2 December 2018

Types of textile fibers – list of textile fibers by its sources

In this article a comprehensive textile fiber names are listed, would answer your following questions. Type of Textile Fibers | Classification Textile Fibers | List of Textile Fibers | Textile Fiber Names | Textile Fiber Sources | Kind of Textile Fibers| Textile fibers and their properties | Fibers used for in textiles | Fibers considered as textile | Examples of fibers | Widely used textile fibers | What is textile fiber | Natural Fibers | Man made Fibers | Artificial Fibers

Fiber is a fine hair-like structure and is considered the raw materials of textiles. The fiber is extracted from various sources for commercial use. In addition to obtaining from animals, plants, and minerals, many of the fibers are artificially generated as well. Here is a list of most commonly used textile fibers.

Type of textile fibers can be broadly divided into natural fibers and man-made or chemical fibers. They can be further divided based on the source from where the fibers are obtained.
Fibers are commonly classified as follows (based on the source of the fibers):
Natural FibersManmade Fibers
Animal FibersPlant FibersNatural PolymersSynthetic Polymers
HairSecretionSeedBastLeaf
  1. Alpaca
  2. Angora
  3. Camel
  4. Cashmere
  5. Wool
  6. Chiengora
  7. Llama
  8. Mohair
  9. Qiviut
  10. Vicuna
  11. Yak
  1. Byssus
  2. Silk
  1. Cotton
  2. Coir
  3. Kapok
  1. Banana
  2. Flax/Linen
  3. Hemp
  4. Jute
  5. Kenaf
  6. Ramie
  7. Sugarcane
  1. Abaca
  2. Pina
  3. Raffia
  4. Sisal

  1. Acetate
  2. Bamboo
  3. Lyocell
  4. Modal
  5. Rayon
  1. Acrylic
  2. Kevlar
  3. Nomex
  4. Nylon
  5. Polyester
  6. Spandex

Natural Fibers

Natural Fibres are nonsynthetic hair-like materials of continuous filaments come from natural growing sources – both plants and animals. Demand for textile fibers such as flax, hemp, jute, kenaf, sisal, and Sugarcane bagasse has increased due to the possibilities of blending with reinforced polymer materials and easy availability of natural fibers.

Animal Fibers


Animal textile fibers commercially used today are generally obtained from the mammals such as Sheep, Goat, Angora Rabbit, Lama, Alpaca, Vicuna, Guanaco, Camel, Yak, Northern American Buffalo, and Musk Ox. The fibers extracted from these animals greatly differ in terms of biological, chemical and physical features. The silk fiber is the only fiber obtained from an insect (secretion) – silkworm.

Animal Hair/Wool Fibers

  1. Sheep Wool

    wool shearingWool is the common name applied to the soft, curly fibers obtained chiefly from the fleece of domesticated sheep, and used extensively in textile manufacturing. Wool production from sheep is affected by nutrition, climate, and care.
    Sheep wool categorized by different breeds:
    • Fine Wool
    • Long Wool
    • Double coated
    Common Sheep Breeds:
    • Border Leicester
    • Cheviot
    • Columbia
    • Corriedale
    • Debouillet
    • Delaine-Merino
    • Dorset
    • Finnsheep
    • Hampshire
    • Lincoln
    • Montadale
    • Oxford
    • Rambouillet
    • Romney, Shropshire
  2. Mohair Wool

    mohair-sheepMohair is the fleece produced by Angora goats, generally refers to a silk-like pile fabric or yarn. Most notable for its high luster and sheen, mohair takes to dye exceptionally well and can be blended with other yarns to enhance the quality of the overall textile. The Angora goat is thought to originate from the mountains of Tibet, eventually migrating to Ankara, Turkey by the 16th Century.
  3. Alpaca Wool

    alpaca animalAlpaca wool is a soft, warmth, and lightweight fiber sheared from Alpaca, a member of the biological family of Camelidae, has loft and is well suited for knitted and crocheted products as well as woven applications. Alpaca fiber has brightness and crimp. The fiber is known for its fineness, luster, lightweight and insulating qualities.
    Major Alpaca fiber sourcing camelids:
  4. Angora Wool

    angora-goatAngora Wool is a soft keratinous textile material, produced by the long-haired Angora rabbit. Angora fiber is known to be well blended with lamb or sheep wool, primarily to make spinning easier, but also to improve the washing qualities and to increase versatility.
    Major breeds of Angora rabbits :
    • English
    • French
    • Giant
    • Satin
  5. Camel Hair

    camelCamel hair fibers belong to the class of specialty hair fibers with unique characteristics such as luster, softness, warmth, and natural color and sourced from Camels. Camel’s hair blended with wool, silk, and synthetic fibers are considered more valuable.
    Major fiber sourcing camel varieties.
    • Arabian ña
    • Guanaco
    • South America camelid
  6. Cashmere Wool

    cashmere-goatCashmere wool is obtained from the Cashmere Goat, which is native in Tibet and in Northern India. It has been sorted according to its natural color, white, gray or brown colors. The raw fiber must be de-haired to separate the fine soft cashmere from coarse and worthless hair.
  7. Llama Wool

    llama-goatLlamas, a kind of sheep, are native to areas of high altitude and relatively cool climate with low humidity of the South American Andes. The llama is a two-coated animal. Its fine, downy undercoat gives protection from cold and heat. Llamas do vary considerably in fleece length and thickness, so the importance and frequency of shearing will depend on the individual animal as well as climate.
  8. Qiviut Woolqiveut ox

    Musk oxen belong to Bovidae family which includes bison, buffalo, antelope as well as domesticated sheep, cattle and goats. Qiviut fiber is long with a diameter of 12 – 18 microns which makes it even softer than average cashmere. Much warmer than wool, it is worn as an insulating layer in clothing because it wicks moisture from the body and doesn’t shrink or felt.
  9. Chiengora Hair

    dogAny dog fiber with a staple longer than 2-3 inches can be used to make yarn, although longer fibers are easier to spin and make for more durable garments. Shorter fibers can be carded with silk or wool to be made into yarn. Dogs with particularly long hair and dual coats, like Samoyed or Great Pyrenees are best for fiber production.
  10. Yak Wool

    yakTextile products made of yak wool is highly competitive with cashmere in terms of quality. Regarded as one of the remarkable domestic animals, yak thrives in cold climatic conditions that tower the highest elevations.
    Yak varieties:
    • Arhangai
    • Bayanhongor
    • Zavhan
    • Uvurhangai
  11. Vicuña Wool

    vicunaVicuñas produce the finest animal fiber in the world. The vicuña is a South American Camelid belonging to the infra-order Tylopoda, and family Camelidae. Vicuñas are the only truly wild species that can be captured, sheared and re-released on a commercial basis. Vicuña has been protected by the International Convention for the Trade of Endangered Species (CITES) since 1973 and by the Vicuña Convention signed by Argentina, Bolivia, Chile, and Perú since 1979.

Animal Secretion Fibers

  1. Silk Fiber

    silk cocoonSilk fibers are natural fibrous protein-based materials, spun by Lepidoptera larvae such as silkworms, spiders, scorpions, mites, and flies. Recently silk is preferred for biomedical, textile and biotechnology industries due to its unique non-toxicity, biocompatibility, and biodegradability properties.
    Silk is rightly called the queen of textiles for its luster, sensuousness, and glamour. The silk rival with the most advanced synthetic polymers, yet the production of silk does not require harsh processing conditions.

Plant/Vegetable/Cellulosic Fibers


Natural plant fibers are cell walls that occur in the stem, wood, and leaf parts and are comprised of cellulose, hemicelluloses, lignins and aromatics, waxes and other lipids, ash and water-soluble compounds attached in a specific way. Plant fibers are classified into two groups: soft fibers and hard fibers.

Plant Seed Fibers

  1. Cotton Fiber

    Cotton PlantCotton is a vegetable fiber which surrounds the seeds of the cotton plant, a shrub in the Malvaceae family. The fiber is generally transformed into yarn which is woven to manufacture fabrics. Cotton has been used for millennia in the confection of fabric, with the earliest known use dating from 12,000 years B.C. in Egypt.
    Classification is used to determine the quality of the cotton fiber in terms of length, uniformity, strength, micronaire, and color. Cotton classification (and quality) can also be affected by trash content, leaf grade, and the presence of extraneous matter.
  2. Coir Fiber

    coir-huskCoir is a durable fiber extracted from discarded coconut husks. Coir or coconut Fibre belongs to the group of hard structural fibers. Coir fibers are categorized in two ways.
    One distinction is based on whether they are recovered from ripe or immature coconut husks.
    • The husks of fully ripened coconuts yield brown coir. Strong and highly resistant to abrasion, its method of processing also protects it from the damaging ultraviolet component of sunlight. Dark brown in color, it is used primarily in brushes, floor mats, and upholstery padding.
    • White coir comes from the husks of coconuts harvested shortly before they ripen. Light brown or white in color, this fiber is softer and less strong than brown coir. It is usually spun into yarn, which may be woven into mats or twisted into twine or rope.
  3. Kapok Fiber

    kapok tree
    Pod Ceiba Safed Semal White Silk-cotton Tree Kapok
    Kapok fiber is a natural and environmental-friendly cellulosic fiber with a lightweight of volume units, hollow structure. Kapok fiber is soft silky cellulosic fiber but has a significantly homogeneous hollow tube shape.
    Kapok is considered unsuitable for textile purposes because the fiber is brittle, smooth and slippery. They are used in bedding, upholstery industries, in the production of life-saving equipment and in the construction of thermally insulated and soundproof covers and walls.

Plant Bast Fibers

Bast consists of a wood core surrounded by a stem. Within the stem, there are a number of fibers bundles, each containing individual fiber cells. The filaments are made up of cellulose and hemicelluloses, bonded together by lignin and pectin.
  1. Jute Fiber

    Jute PlantJute is a natural fiber with golden and silky shine because of which also called as the golden fiber. It is one of the cheapest vegetable fibers obtained from the bast or skin of plant’s stem. Jute is mainly extracted from the stem of white jute plant (Corchorus capsularis) and from Tossa jute (C.olitorius).
    Jute is a natural biodegradable fiber with advantages such as high tensile strength, excellent thermal conductivity, coolness, ventilation function. Jute has high specific properties, low density, less abrasive behavior to the processing equipment, good dimensional stability, and harmlessness. Jute is multicelled with the cell wall of the fiber is made up of a number of layers.
  2. Flax/Linen Fiberflax plants

    Flax is the plant that produces the bast fiber that is made into linen. Linen fiber is plant fiber collected from the phloem (the “inner bark”) or bast surrounding the stem of certain, mainly dicotyledons, plants. They support the conductive cells of the phloem and provide strength to the stem. Hemp fiber contains the phenolic substance, so it has anti-moldy and bacteriostatic properties.
  3. Hemp Fiber

    hemp plantHemp is a fast‐growing plant that generally requires little or no chemical herbicides and pesticides. Hemp can be processed as a bast fiber, or as a regenerated fiber. Hemp is a member of the Cannabaceae family and is a plant which produces bast fibers. Hemp (also known as Cannabis) was one of the first plants to be cultivated by the human race and was previously considered to be one of the most important agricultural crops.
  4. Banana Fiber

    banana-plantAll varieties of banana plants have fibers in abundance that fall under bast fibers category. The fibers are collected after the fruit is harvested from the trunk of the banana plant (pseudostem), which usually is usually thrown as an agricultural waste.
  5. Ramie Fiber

    ramie-plantRamie is one of the strongest natural fibers. It exhibits even greater strength when wet. Ramie fiber is known especially for its ability to hold shape, reduce wrinkling, and introduce a silky luster to the fabric appearance. It is not as durable as other fibers, and so is usually used as a blend with other fibers such as cotton or wool.
    It is similar to flax in absorbency, density, and microscopic appearance. Because of its high molecular crystallinity, ramie is stiff and brittle and will break if folded repeatedly in the same place; it lacks resiliency and is low in elasticity and elongation potential.
  6. Kenaf Fiber

    Kenaf Kenaf fiber is a natural fiber extracted from Hibiscus cannabinus L. The kenaf trunks need to be retted in order to extract the fiber. Kenaf fiber possesses excellent tensile and flexural strength when compared with other natural fibers.
  7. Sugarcane bagasse

    Sugarcane is a plant which grows up to 6 meters high and has a diameter up to 6 cm, and the bagasse is the fibrous residue which is obtained from sugarcane processing after extraction of the juice from the cane stalk.

Plant Leaf Fibers

  1. Piña Fiber

    pina-plantPineapple leaf fiber is one kind of fiber derived from the leaves of the pineapple plant. From a large selection of plant fibers, pineapple leaf fibers obtained from the leaves of pineapple plant of Josapine have the highest cellulose contents which make the fibers mechanically sound.
    Pineapple Leaf Fiber exhibit excellent mechanical properties due to rich cellulose content of more than 70% which are potential to be used as reinforcement in polymer composites.
  2. Sisal Fiber

    sisal plant

    The sisal fibers obtained from the leaf of sisal plants are white/golden white in color. They can be twisted into yarns and ropes in wet conditions. Fiber thickness, length, and strength depend upon the age and location of the plant. The length varied from 0.5m to 1m and diameter is 43 between 0.21mm to 0.29mm. The density of the fiber was found to be around 1.51 g/ cm3.
  3. Raffia Fiber

    raffia-plantRaffia fibers are leaf fibers obtained raffia palms. Raffia fabrics are used for everyday garments or “ceremonial costumes” among some ethnic groups of Central Africa from the coast of the Gulf of Guinea.
    Raffia is a plant that belongs to a palm genus that originated from Madagascar and grows in tropical rainforests, along river banks of the savannah, marshes, and swamps in the areas stretching from Madagascar, where it originated, to the Congo and Gabon of Central Africa, Cameroon, Nigeria, and Liberia alongside of the Gulf of Guinea.
  4. Abaca Fiber

    abaca-plantAbaca is a leaf fiber which belongs to the banana family of plants with more tapering the leaves than Banana and is cheap and abundantly available. Known as Manila Hemp Abaca is a hard fiber. Abaca is the strongest of all natural fibers.
    Abaca fiber is extracted from the leaf sheath traditionally by stripping using either manual or mechanical process. Volcanic areas are suited for abaca cultivation the Philippines tropical climate. It has a lot of applications in the household as well as technical areas.

Mineral Fibers


  1. Asbestos Fiber

    Asbestos is a mineral. It is a natural rock mined from the ground. Asbestos fibers are very light. Asbestos was used in a variety of residential and commercial building products including floor tile; ceiling tile; sound and thermal insulation; siding; roofing; spackling; plaster and stucco; and paints.
    Types of Asbestos:
    • Chrysotile/ white asbestos
    • Amosite/ brown asbestos
    • Crocidolite/ blue asbestos
  2. Glass/Fiberglass Fiber

    Fiberglass-FabricGlass melts are made by fusing (co-melting) silica with minerals, which contain the oxides needed to form a given composition. The molten mass is rapidly cooled to prevent crystallization and formed into glass fibers by a process also known as fiberization.

Manmade Fibers


Man-made fibers are fibers in which either the basic chemical units have been formed by chemical synthesis followed by fiber formation or the polymers from natural sources have been dissolved and regenerated after passage through a spinneret to form fibers. This fiber came to success when the researchers obtained a product by condensation of molecules presenting two reactive aminic groups with molecules characterized by two carboxylic reactive groups.

Fibers from Natural Polymers

  1. Bamboo Fiber

    bamboo-plantBamboo is the vernacular term for perennial, giant woody evergreen plants in the grass family Poaceae. Bamboo is a natural lignocellulosic fiber obtained from bamboo culm. Its chemical composition is similar to bast fiber so, its structure and properties are often compared with other bast fibers such as flax and jute.
  2. Modal Fiber

    modal-fiberLenzing is a company that produces Lenzing Modal® fibers, which is extracted from beech wood. Modal Fiber is very soft, shiny in nature and silk feel than mercerized cotton with the ability to absorb up to 50% more water than cotton.
  3. Lyocell Fiber

    Lyocell FabricThe cellulose fibers produced by direct dissolution have the generic name of lyocell. Lyocell is similar in strength to polyester and stronger than cotton and all other man-made staple fiber cellulosic. It also has very high dry and a wet module for cellulosic fiber in both the dry and wet states.
  4. Rayon Fiber

    rayon-fiberIn the production of Rayon Fiber, purified cellulose is chemically converted into a soluble compound. A solution of this compound is passed through the spinneret to form soft filaments that are then converted or “regenerated” into almost pure cellulose. Because of the reconversion of the soluble compound to cellulose, Rayon is referred to as a regenerated cellulose fiber.
    Purified cellulose for Rayon production usually comes from specially processed wood pulp and is called “dissolving cellulose” or “dissolving pulp” to distinguish it from lower grade wood pulps used for papermaking and other purposes.
  5. Acetate Fiber

    acetate-fabricThere are two types of cellulose-based fibers; regenerated/pure cellulose (such as the fibers from the cupro-ammonium process) and modified cellulose (such as the cellulose acetates and rayon).
    Acetate is derived from cellulose by breaking down wood pulp (dissolving pulp) into purified cellulose. By reacting the purified cellulose with acetic acid and acetic anhydride, whilst using sulfuric acid as a catalyst, cellulose acetate dope is produced.

Fibers from Synthetic Polymers

  1. Polyester Fiber

    polyesterPolyester is a Synthetic, Non-Renewable Fiber derived from petroleum. Polyester has surpassed cotton as the most commonly produced fiber. They are used in varying applications ranging from apparel, home textiles or can be processed to be used in industrial applications.
  2. Nylon Fiber

    nylon fabricNylon a Polyamide, it is a condensation polymer. Nylon is thermoplastic silky materials that can be melt processed into fibers, films or shapes. Nylon is a tough material that is difficult to tear and exhibits excellent abrasion resistance. Nylon fibers were the first truly synthesized manufactured fibers; introduced in the 1930s as a replacement for boar bristles in toothbrushes, nylon fiber quickly found itself adapted into several forms of manufactured items.
  3. Spandex Fiber

    spandex
    Spandex is the generic name for synthetic fiber, whose fiber-forming substance is a long chain synthetic polymer. Spandex fibers exhibit superior stretch and elastic recovery ability, providing garments containing spandex fibers with good fitting and comfort characteristics.
  4. Acrylic Fiber

    Acrylic fibers are synthetic fibers made from a polyacrylonitrile polymer. Acrylic fibers are the third largest class of synthetic fiber after polyester and nylons.
  5. Kevlar Fiber

    kevlar-fabricKevlar aramid fiber was developed by DuPont scientists researching liquid crystalline polymer solutions. Kevlar is a manmade fiber, it as an organic fiber in aromatic polyamide family. Kevlar is made by a condensation reaction of an amine (1, 4-phenylenediamine) and acid chloride (terephthaloyl chloride).

Wednesday, 21 November 2018

Cultivation of Cotton Fibre

Successful cultivation of cotton requires a long frost-free period, plenty of sunshine, and a moderate rainfall, usually from 60 to 120 cm (24 to 47 in). Soils usually need to be fairly heavy, although the level of nutrients does not need to be exceptional. In general, these conditions are met within the seasonally dry tropics and subtropics in the Northern and Southern hemispheres, but a large proportion of the cotton grown today is cultivated in areas with less rainfall that obtain the water from irrigation. Production of the crop for a given year usually starts soon after harvesting the preceding autumn. Cotton is naturally a perennial but is grown as an annual to help control pests. Planting time in spring in the Northern hemisphere varies from the beginning of February to the beginning of June. The area of the United States known as the South Plains is the largest contiguous cotton-growing region in the world. While dryland (non-irrigated) cotton is successfully grown in this region, consistent yields are only produced with heavy reliance on irrigation water drawn from the Ogallala Aquifer. Since cotton is somewhat salt and drought tolerant, this makes it an attractive crop for arid and semiarid regions. As water resources get tighter around the world, economies that rely on it face difficulties and conflict, as well as potential environmental problems.[45][46][47][48][49] For example, improper cropping and irrigation practices have led to desertification in areas of Uzbekistan, where cotton is a major export. In the days of the Soviet Union, the Aral Sea was tapped for agricultural irrigation, largely of cotton, and now salination is widespread.
Cotton can also be cultivated to have colors other than the yellowish off-white typical of modern commercial cotton fibers. Naturally colored cotton can come in red, green, and several shades of brown.

Genetic modification

Genetically modified (GM) cotton was developed to reduce the heavy reliance on pesticides. The bacterium Bacillus thuringiensis (Bt) naturally produces a chemical harmful only to a small fraction of insects, most notably the larvae of moths and butterflies, beetles, and flies, and harmless to other forms of life.The gene coding for Bt toxin has been inserted into cotton, causing cotton, called Bt cotton, to produce this natural insecticide in its tissues. In many regions, the main pests in commercial cotton are lepidopteran larvae, which are killed by the Bt protein in the transgenic cotton they eat. This eliminates the need to use large amounts of broad-spectrum insecticides to kill lepidopteran pests (some of which have developed pyrethroid resistance). This spares natural insect predators in the farm ecology and further contributes to noninsecticide pest management.
But Bt cotton is ineffective against many cotton pests, however, such as plant bugs, stink bugs, and aphids; depending on circumstances it may still be desirable to use insecticides against these. A 2006 study done by Cornell researchers, the Center for Chinese Agricultural Policy and the Chinese Academy of Science on Bt cotton farming in China found that after seven years these secondary pests that were normally controlled by pesticide had increased, necessitating the use of pesticides at similar levels to non-Bt cotton and causing less profit for farmers because of the extra expense of GM seeds. However, a 2009 study by the Chinese Academy of Sciences, Stanford University and Rutgers University refuted this. They concluded that the GM cotton effectively controlled bollworm. The secondary pests were mostly miridae (plant bugs) whose increase was related to local temperature and rainfall and only continued to increase in half the villages studied. Moreover, the increase in insecticide use for the control of these secondary insects was far smaller than the reduction in total insecticide use due to Bt cotton adoption. A 2012 Chinese study concluded that Bt cotton halved the use of pesticides and doubled the level of ladybirds, lacewings and spiders. The International Service for the Acquisition of Agri-biotech Applications (ISAAA) said that, worldwide, GM cotton was planted on an area of 25 million hectares in 2011. This was 69% of the worldwide total area planted in cotton.
GM cotton acreage in India grew at a rapid rate, increasing from 50,000 hectares in 2002 to 10.6 million hectares in 2011. The total cotton area in India was 12.1 million hectares in 2011, so GM cotton was grown on 88% of the cotton area. This made India the country with the largest area of GM cotton in the world. A long-term study on the economic impacts of Bt cotton in India, published in the Journal PNAS in 2012, showed that Bt cotton has increased yields, profits, and living standards of smallholder farmers. The U.S. GM cotton crop was 4.0 million hectares in 2011 the second largest area in the world, the Chinese GM cotton crop was third largest by area with 3.9 million hectares and Pakistan had the fourth largest GM cotton crop area of 2.6 million hectares in 2011. The initial introduction of GM cotton proved to be a success in Australia – the yields were equivalent to the non-transgenic varieties and the crop used much less pesticide to produce (85% reduction). The subsequent introduction of a second variety of GM cotton led to increases in GM cotton production until 95% of the Australian cotton crop was GM in 2009 making Australia the country with the fifth largest GM cotton crop in the world. Other GM cotton growing countries in 2011 were Argentina, Myanmar, Burkina Faso, Brazil, Mexico, Colombia, South Africa and Costa Rica. 
Cotton has been genetically modified for resistance to glyphosate a broad-spectrum herbicide discovered by Monsanto which also sells some of the Bt cotton seeds to farmers. There are also a number of other cotton seed companies selling GM cotton around the world. About 62% of the GM cotton grown from 1996 to 2011 was insect resistant, 24% stacked product and 14% herbicide resistant.
Cotton has gossypol, a toxin that makes it inedible. However, scientists have silenced the gene that produces the toxin, making it a potential food crop.

Organic production

Organic cotton is generally understood as cotton from plants not genetically modified and that is certified to be grown without the use of any synthetic agricultural chemicals, such as fertilizers or pesticides. Its production also promotes and enhances biodiversity and biological cycles. In the United States, organic cotton plantations are required to enforce the National Organic Program (NOP). This institution determines the allowed practices for pest control, growing, fertilizing, and handling of organic crops. As of 2007, 265,517 bales of organic cotton were produced in 24 countries, and worldwide production was growing at a rate of more than 50% per year.