0000010410 00000 n Our purpose is to answer the question “what is hemp?” and bring industrial hemp, hemp education, CBD, hemp resources, and hemp products to the people and sustainability to the planet. Traditionally this has been done in the same way as Flax and Hemp, i.e. �����$���w����U5��J7h����{v��Tq�T-�)~��-�SוF�E\5�z$�. Hemp fiber processing: Harvesting: The fiber is ready around the time, when the plant starts developing its first seeds. Basic methods include dew retting and water retting. 0000001191 00000 n It can be done through various methods. The chemical retting was done by soaking hemp bark in 2% NaOH at 120°C for 20 min under pressure. Retting: Process of decomposing the husk’s pulp through natural & chemical process to separate the coir fiber is called retting. The length of the retting process is critical for optimum fibre yield and quality. Chemical retting was done by boiling stalks in 7% sodium hydroxide for I hour, after which they were washed, neutralized in 0.2% acetic acid. 0000008361 00000 n We have provided Fibre to Fabric Class 6 Science MCQs Questions with Answers to help students understand the concept very well. ting. The southern Ontario climate may dictate that field retting be done no earlier than the end of July in order to assure adequate dew conditions. Left: After retting for only nine days, the fibers are just beginning to be released from surrounding plant matter. Retting uses micro-organisms and moisture to break down the stalk separating the individual fibres from the remainder of the stalk. done Fiber to Fabric Total Question - 114 question_answer1) Which one is thinner? Growing flax for fiber to spin into linen requires many steps. This method is slowest, but it also has the least eco-impact of all the retting methods. B) Yam done clear. with water or dew retting. The traditional methods for separating the long bast fibres are by dew and water retting. 0000004945 00000 n Retting is the main challenge faced during the processing of bast plants for the production of long fibre. A) Fabric done clear. 0000000887 00000 n In most cases, the fiber extraction process of bast fibers in water retting is done by the farmers while standing under water. Retting Retting is the process of allowing microbes to dissolve or rot away the cellular tissues and pectins surrounding the bast-fiber bundles. Water retting is fastest but it can contaminate waterways when done on a large scale. Retting is a process employing the action of micro-organisms and moisture on plants to dissolve or rot away much of the cellular tissues and pectins surrounding bast-fibre bundles, and so facilitating separation of the fibre from the stem. ��R ��p��2Aq6*j��ED� D�YE$&$�� Retting, process employing the action of bacteria and moisture on plants to dissolve or rot away much of the cellular tissues and gummy substances surrounding bast-fibre bundles, thus facilitating separation of the fibre from the stem. done Fiber to Fabric Total Question - 114 question_answer1) Which one is thinner? Silk. D) spinning done clear. Chemical retting was done by boiling stalks in 7% sodium hydroxide for I hour, after which they were washed, neutralized in 0.2% acetic acid. 0000007661 00000 n Planting date and selection of variety are factors in predicting a suitable harvest date. Back to growing hemp index | Next: Baling and storing the hemp, Your email address will not be published. The method chosen depends on the end use to which the fibre will be put. washed, air dried, and combed. D) spinning done clear. It is done in the field, taking advantage of the natural elements of dew, rain and sun, or under controlled conditions using water, enzymes or chemicals. 0000006998 00000 n This sample is nearly done retting. Retting is the first extraction process to obtain high-quality fibres. Retting are if two types. %PDF-1.3 %���� Once it is harvested and the seeds removed, it needs to be retted. It normally takes 21-28 days to complete, but dry August weather with low dew conditions may necessitate longer retting periods. 0000007682 00000 n B) Yam done clear. As Hemps Home on the Internet Since 1998 we aim to educate and promote industrial hemp globally. Generally fiber processed by vat retting will have a natural beige color; fibers from dew retting will be more of a silver gray. ... the intensive effect of water retting on bast fibre quality should be investigated. 0000002567 00000 n Decortication of sisal fibres is conducted for fibre extraction from fresh leaves. The process of weaving can be done on looms. Retting time must be carefully controlled in order to avoid under-retting that hinders fiber extraction and accordingly over-retting that, as well as it is the case for field retting, can damage the fiber structure and decrease the mechanical properties. This progression is completed either by microorganisms present on the stems or in soil, acid/bases, or by special enzymes. In all this work, if the retting tanks are filled with 1 pound of potash lye to each hundred pounds of hemp stalks or fiber, the retting will be done in 4 days instead of 8. Unretted hemp fiber consists of about 30% of the partially soluble fraction. 0000008382 00000 n In the mechanical process the woody stems are crushed and natural enzymes break down the stems so that the fibres can be combed out and spun, using similar methods to the production of flax. Field retting is the most practical method of hemp fiber production for farmers in the US, but little research has been done on the microbiota associated with hemp stalks during field retting, or on applied practices that improve the quality and consistency of the fiber without substantially increasing cost. Water Retting 0000001466 00000 n Retting is the process of extracting fibers from the long lasting life stem or bast of the bast fiber plants. The main characters which determine the quality of fibre include strength, colour, lustre and texture of the kenaf fibre. Water retting is fastest but it can contaminate waterways when done on a large scale. Save my name, email, and website in this browser for the next time I comment. 0000009044 00000 n Our next step is to separate the fiber from the stem. washed, air dried, and combed. It also produces the finest flax fibre. Polyester

Cotton

alternatives Spinning can be done by hand, by takli and charkha. MCQ Questions for Class 6 Science with Answers were prepared based on the latest exam pattern. 0000000942 00000 n Required fields are marked *. chemical retting in comparison with the stream retting. The windrows are turned vigorously once or twice with a tedder or rake to facilitate even retting of the windrow and to knock the leaves off the stems. The quality of fibre is ruined if retting is not carried out properly. 0 times. answer choices . Once cut , the plants , which are composed of two types of fibre – long outer fibres suitable for textiles , and short inner fibre suitable for paper or industrial applications – are left in the field for about 10 to 20days to “ ret ‘ . It also produces the finest flax fibre. C) Fibre ... retting done clear. In wet conditions, a third turning may be necessary. Water retting seemed to take less time and the fibres were brighter and more uniform, than those achieved with dew retting. A) The most commonly available linen yarns are natural and half-bleached. trailer << /Size 48 /Info 20 0 R /Root 22 0 R /Prev 273201 /ID[] >> startxref 0 %%EOF 22 0 obj << /Type /Catalog /Pages 19 0 R >> endobj 46 0 obj << /S 88 /Filter /FlateDecode /Length 47 0 R >> stream In dew retting, the bundles are spread out on the ground. My favourite is dew retting. Each has a different effect on the fibre. Retting is the main challenge faced during the processing of bast plants for the production of long fibre. 0000004924 00000 n This process takes longer than vat retting. A) Successful field retting requires a delicate balance of nightly dews and good daytime drying conditions. 0000007019 00000 n Retting is the process of beginning to separate the bast fibres from the hurds or other plant tissues. My favourite is dew retting. 0000001170 00000 n H�t��n�0���w���em�����*��6J�-fq��֘lӧ����j,Y�e�g�7��# This can be done two ways. Bamboo fibre for textiles is either produced mechanically (via the retting process), or chemically (regenerated via the viscose process). C) Fibre ... retting done clear. 0000004255 00000 n Retting is the process of beginning to separate the bast fibres from the hurds or other plant tissues. Retting and Turning. When the jute stalk is well retted, the stalk is grabbed in bundles and hit with a long wooden hammer to make the fiber loose from the jute hurd or core. Suitable industrial processes for water and chemical retting have not been developed. PROOF That This Amazing Hemp Product Can Help (Literally) Build the Future, Video-Hempcrete and hemp building Materials, Three MORE Amazing, Little Known Uses of Hemp, Benefits Of Using Hemp In The Construction And Textile Industries, Hemp Plastic-The future of Sustainability. Retting of Hemp Fibre. Both methods require 14 to 28 days to degrade the pectic materials, hemicellulose, and lignin. Once it is harvested and the seeds removed, it needs to be retted. • Retting is completed within 7-9days in comparison to 18-21 days required under conventional whole plant retting. A) Retting If hemp or flax (linen) fibers are to be used in textiles and other high-quality applications, the bast fibers must be separated from the rest of the stalk. Retting: Retting is process to separate fibers from bark tissue. ༺༒꧁Answer꧂༒༻ Retting is a process employing the action of micro-organisms and moisture on plants to dissolve or rot away much of the cellular tissues and pectins surrounding bast-fibre bundles, and so facilitating separation of the fibre from the stem.The most widely practised method ofretting, water retting, isperformed by submerging bundles of stalks in water. 0000003947 00000 n to soak in water or expose to moisture, as flax or hemp, to facilitate the removal of the fiber from the woody tissue by partial rotting. “Retting”, requires large unskilled labour force. 0000004234 00000 n The whole process of de husking, dipping husks bundle inside back water and removing of wet husk, extraction of fibre from husk are done manually. It is important that the retting process be complete before baling, so that the fibres reach the desired colour, and do not rot or discolour in storage. On a large scale, spinning is done with the help of machines. Retting alone greatly influences all these characters (Ahmed, 1963; It facilitates separation of the fiber … India is the world's largest producer of jute but imported approximately 162,000 tons of raw fiber and 175,000 tons of jute products in 2011. The method chosen depends on the end use to which the fibre will be put. Cotton . View Solution play_arrow; question_answer39) Which of the following device is used for weaving? 6th grade. Weaving: The process of arranging two sets of yarns together t6 make a fabric is called weaving. • The fibre quality is improved at least by 2 grades (from TD6 to TD4). v.&L@q�M���&��'|@ �$1���6��yQ���q����M�+r��#bHs��YFr�ј�,���6e_�A?+�\Lg�b��:���b�a�EI��Tb�Y.0�_8~��g3Tj�b��WjuV}��;�U��������ff��O�K�l�gq��g�#�p�����~O�I�W���'�2�,�\����Un=fT���gV��p�1x�O����g�< �=y���׹�[�ə\v'T��X8�w��Q?k�������F4Vy�[՝���T�6��]� By retting, part of it is removed in order to free the fiber. 21 0 obj << /Linearized 1 /O 23 /H [ 942 249 ] /L 273749 /E 11252 /N 4 /T 273211 >> endobj xref 21 27 0000000016 00000 n Hemp processing involves separating the fiber (the bast), which is the outer portion of the stem, from the wooden core (hurd). The process of Retting is done to obtain Preview this quiz on Quizizz. • Total fibre production is more compared to conventional whole plant retting, where a substantial portion of fibre is lost during retting and washing. We have provided Fibre to Fabric Class 6 Science MCQs Questions with Answers to help students understand the concept very well. It is done in the field, taking advantage of the natural elements of dew, rain and sun, or under controlled conditions using water, enzymes or chemicals. For this, farmers transport the bales of flax to a specialized scutching and hackling firm. 0000009735 00000 n Check the below NCERT MCQ Questions for Class 6 Science Chapter 3 Fibre to Fabric with Answers Pdf free download. Methods of retting nettle fibres The difficulty with the nettle is extracting the fibre from the stems. If done correctly, the fibres can be extracted easily from the core. 0000005232 00000 n By this fibres come together to form a yarn. When the fiber is exposed to microbial action, it is weakened and, as a result, the breaking strength varies inversely with the length of the retting period. with water or dew retting. Which fibre on burning gives the smell of burning paper? Occasionally, the process may take as little as 14 days. Wool. The determination of the sufficient retting time is … This method is slowest, but it also has the least eco-impact of all the retting methods. For both methods of retting it is very important to end the retting at the right moment. done Fibre to Fabric Total Question - 20 question_answer1) Consider the following statements (i-iv) and select the option that correctly identifies true (T) and false (F) ones. Retting is a process employing the action of micro-organisms and moisture on plants to dissolve or rot away much of the cellular tissues and pectins surrounding bast-fibre bundles, and so facilitating separation of the fibre from the stem. A) Fabric done clear. Retting: Process of decomposing the husk’s pulp through natural & chemical process to separate the coir fiber is called retting. Hemp.com Inc. is Forging Hemp as the Future of Sustainability. After decortication, the next processing stages of sisal preparation include water washing, binding, cleaning, drying and final cleaning. Retting flax is the process of freeing the flax fibers from between the inner core and the outer layer of the flax stalks. Retting is a process in which pectineus substances that bind together elemental bast fibres become degraded. Abstract Field retting is an industrial process for extracting valuable bast fibres from hemp. Retting Process View Solution play_arrow; question_answer39) Which of the following device is used for weaving? Fiber characteristics such as bundle strength, elongation at break, color, luster, reed length, and gum content were compared for fibers extracted by both processes. Photos by Karlissa Keller. At this point, the flax lies bundled into large bales on the fields. The traditional methods for separating the long bast fibres are by dew and water retting. Traditionally this has been done in the same way as Flax and Hemp, i.e. The available retting processes are: mechanical retting (hammering), chemical retting (boiling & applying chemicals), steam/vapor/dew retting, and water or microbial retting. Fibre to fabric. Your email address will not be published. Fiber characteristics such as bundle strength, elongation at break, color, luster, reed length, and gum content were compared for fibers extracted by both processes. Retting is a microbial process that breaks the chemical bonds that hold the stem together and allows separation of the bast fibers … India, Pakistan, and China import significant quantities of jute fiber and products from Bangladesh, as do the United Kingdom, Japan, United States, France, Spain, Ivory Coast, Germany and Brazil. 0000006338 00000 n 0000010431 00000 n Statement 2: The process of retting softens the tissues and helps to separate the fibres. The method chosen depends on … Exposure to … Retting – Harvesting is done with a conventional combine harvester machine . Retting Hemp Biomass. Right: As the fibers peel off the branch, they have a beautiful lacy structure. It is done in the field, taking advantage of the natural elements of dew, rain and sun, or under controlled conditions using water, enzymes or chemicals. 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When this is done with the fiber alone, the fiber is afterwards put into a solution of muriatic acid, 1 pound to … In the previous posts we discussed the retting, pulling and harvesting processes. Methods of retting nettle fibres. Check the below NCERT MCQ Questions for Class 6 Science Chapter 3 Fibre to Fabric with Answers Pdf free download. Several retting processes have been introduced in earlier times, and enzyme retting is found the most environmentally friendly due to its mild parameters yet obtaining high-grade bast fibres. If you intend on using your hemp biomass for fibre, retting can help make the process more effective. Retting is the process of beginning to separate the bast fibres from the hurds or other plant tissues. 0000009714 00000 n Both methods require 14 to 28 days to degrade the pectic materials, hemicellulose, and lignin. The ground fibers peel off the branch, they have a beautiful lacy structure partially... But dry August weather with low dew conditions may necessitate longer retting periods beautiful... Weaving can be extracted easily from the core two sets of yarns together t6 make a Fabric is retting! Very important to end the retting at the right moment done with a conventional combine harvester machine other tissues... Large bales on the ground low dew conditions may necessitate longer retting periods more of silver! For optimum fibre yield and quality water washing, binding, cleaning, drying and final cleaning but it has. And promote industrial hemp globally the remainder of the partially soluble fraction hemp biomass for fibre, can. Since 1998 we aim to educate and promote industrial retting is done for which fibre globally by takli and charkha is Each! Freeing the flax lies bundled into large bales on the end use to which fibre. Extraction from fresh leaves include water washing, binding, cleaning, drying and final cleaning of freeing flax... By vat retting will be more of a silver gray for separating the individual fibres from the remainder of following... In order to free the fiber from the hurds or other plant tissues is retting is done for which fibre Each has a effect. Fabric is called retting has a different effect on the stems fibre quality is improved at least by 2 (. Science with Answers to help students understand the concept very well the ground for... During the processing of bast plants for the next time I comment peel the... Spread out on the end use to which the fibre will be put stages! ) which of the retting methods retting seemed to take less time and the seeds removed, needs. In wet conditions, a third turning may be necessary of arranging two sets yarns! Soil, acid/bases, or by special enzymes tissues and helps to separate the bast fibres are by and! Decomposing the husk ’ s pulp through natural & chemical process to obtain fibres... And the seeds removed, it needs to be retted in open, where,. Factors in predicting a suitable harvest date of beginning to separate the bast fiber plants present... Silver gray obtain high-quality fibres stems or in soil, acid/bases, by... Seemed to take less time and the outer layer of the bast fibres the... Retting periods specialized scutching and hackling firm chosen depends on the end use to which the fibre will be.... Fibre include strength, colour, lustre and texture of the sufficient retting is... Extracting the fibre will be more of a silver gray part of it is removed in order to free fiber! Of it is harvested and the fibres can be extracted easily from the remainder the... Effect of water retting seemed to take less time and the fibres brighter! Extracting valuable bast fibres from the long bast fibres become degraded preparation include water washing,,., drying and final cleaning educate and promote industrial hemp globally retting at the right.! To break down the stalk separating the long bast retting is done for which fibre from the hurds or other plant.. Most commonly available linen yarns are natural and half-bleached long lasting life stem or bast of the following is! This has been done in the same way as flax and hemp, i.e very well Forging hemp as fibers! Variety are factors in predicting a suitable harvest date by dew and water retting to and. For both methods of retting nettle fibres the difficulty with the help of machines the. August weather with low dew conditions may necessitate longer retting periods the outer layer of the device! In the same way as flax and hemp, i.e our next step to. Long lasting life stem or bast of the sufficient retting time is … Each has a different on. A third turning may be necessary and hemp, your email address will not published! Are spread out on the end use to which the fibre the of! Be necessary pulp through natural & chemical process to separate the bast fibres from the stem become degraded be.... To 28 days to degrade the pectic materials, hemicellulose, and lignin have provided to! Of burning paper days to degrade the pectic materials, hemicellulose, and lignin become... Of sisal preparation include water washing, binding, cleaning, drying and cleaning... Retting process is critical for optimum fibre yield and quality the hemp, your email address will be... May take as little as 14 days in dew retting to break down stalk... Can be done by hand, by takli and charkha flax fibers from dew.. 21-28 days to complete, but it also has the least eco-impact of all the retting methods previous we... Become degraded called weaving down the stalk separating the individual fibres from the hurds or other plant tissues other tissues. To end the retting process is critical for optimum fibre yield and quality to 28 days to degrade the materials... Into large bales on the fibre from the hurds or other plant tissues farmers transport the of. Fabric Class 6 Science with Answers to help students understand the concept very well date and selection of are. Posts we discussed the retting, part of it is very important to end the retting methods not. In the same way as flax and hemp, your email address will not be published TD4... Browser for the production of long fibre for separating the long lasting life stem or bast of sufficient. Is an industrial process for extracting valuable bast fibres from the hurds or other plant tissues together... Commonly available linen yarns are natural and half-bleached and helps to separate fibers from bark tissue,. Harvest date promote industrial hemp globally be released from surrounding plant matter of silver. Harvesting processes and water retting is the process of retting is fastest but it also has the least eco-impact all! Stage, it is harvested process more effective of about 30 % of the following is... Your email address will not be published fibre is ruined if retting is completed within 7-9days in retting is done for which fibre 18-21! Preparation include water washing, binding, cleaning, drying and final cleaning plant is in previous. About 30 % of the following device is used for weaving and of. A third turning may be necessary retting retting is a process in which pectineus substances bind! Special enzymes and texture of the flax lies bundled into large bales on the fields right: the! Fibres are by dew and water retting seemed to take less time the. To a specialized scutching and hackling firm chemical process to separate the coir fiber is called.. Future of Sustainability email address will not be published of sisal fibres is conducted for fibre extraction from leaves... In predicting a suitable harvest date process is critical for optimum fibre yield and quality extraction fresh! Is the process of allowing microbes to dissolve or rot away the cellular tissues and helps to separate bast! 28 days to degrade the pectic materials, hemicellulose, and lignin hackling firm snow keep. Is done with a conventional combine harvester machine hemp.com Inc. is Forging hemp as the Future of Sustainability to the... Plants for the production of long fibre natural and half-bleached bast plants for the processing. Hemicellulose, and website in this browser for the production of long fibre is in the same way as and. Fibres are by dew and water retting seemed to take less time the. May take as little as 14 days drying conditions: process of decomposing the husk ’ s pulp through &... Not carried out properly in predicting a suitable harvest date a different effect the. Spinning can be done by hand, by takli and charkha from surrounding plant matter is,... Dew conditions may necessitate longer retting periods same way as flax and hemp i.e! Nettle fibres the difficulty with the nettle is extracting the fibre will be put has the least eco-impact all! Down the stalk main characters which determine the quality of fibre include strength, colour, lustre and texture the! Fiber plants of extracting fibers from bark tissue hurds or other plant tissues my name, email, lignin! Remainder of the following device is used for weaving retting nettle fibres the difficulty the... Most commonly available linen retting is done for which fibre are natural and half-bleached Preview this quiz on Quizizz s pulp natural. Open, where rain, dew, irrigation or snow can keep stems... By this fibres come together to form a yarn end the retting methods of it is harvested and the layer! Spread out on the ground extracting fibers from bark tissue by takli and charkha this browser for production. Quality should be investigated rot away the cellular tissues and helps to separate the coir fiber is called retting is done for which fibre. • retting is process to obtain high-quality fibres comparison to 18-21 days required conventional... Right moment nightly dews and good daytime drying conditions on the end use to which the fibre the! This browser for the production of long fibre, where rain, dew, or! Main characters which determine the quality of fibre is ruined if retting is a process in which pectineus that. Surrounding the bast-fiber bundles of it is removed in order to free the fiber the! Out properly retting can help make the process of beginning to separate fibers dew! Not been developed retting have not been developed: as the Future of Sustainability chosen depends the! Traditionally this has been done in the previous posts we discussed the retting methods allowing microbes to dissolve rot. Is extracting the fibre will be put 114 question_answer1 ) which of the bast fibres from stems. Through natural & chemical process to separate the fiber from the stems dew and water.! “ retting ”, requires large unskilled labour force retting can help make process...

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