Fabrics classified by Patterns All Rights Reserved. Save my name, email, and website in this browser for the next time I comment. Gradually, silk production spread westwards over Asia. Physical properties of silk. Shon Truxler. Reaction to alkalis: Silk isnt as sensitive as wool to alkalis.It is effective in high concentration and temperature. 8. Dyeing at low temperature by direct, acid, basic, vat and reactive dyes could be done. The plasma treated sample shows better results in all the physical mechanical and comfort properties. Visco-elastic behavior: Silk fiber length varies from 400 to 700 meters. There are four major categories of fabric characteristics that interest the apparel manufacturer. Muga Silk. five The main countries that produce silk today are China, Japan, Vietnam, Korea, Thailand, India, Uzbekistan, Brazil and Romania. Ahsanullah University of Science & Technology (AUST) Manage Settings Biological Properties: Basic Concept on Silk Fiber: These cookies will be stored in your browser only with your consent. This cookie is set by GDPR Cookie Consent plugin. Secondly, Length: Silk fiber length varies from 400 to 700 meters. Silk is more sensitive to heat than wool. I am Very interested in blogging. They have a higher tensile strength than glass fiber or synthetic organic fibers, good elasticity and excellent resilience. Flammability: By clicking Accept, you consent to the use of ALL the cookies. Youre clearly the idiot that doesnt understand textile vocabulary. It's a relatively thick plastic layer. Finally, it dissolves in solutions of concentrated caustic alkalis. Mulberry silk is the highest quality out there and products labeled "22 momme" or "25 momme" offer superior softness and durability the number accounts for how much silk is present per square inch of material, meaning the higher the number, the . This is exemplified when a consumer handles a fabric and refers to the fabric with adjectives such as stiff, soft, hand, etc. The lower the thermal conductivity of clothing (that is, the slower the thermal conductivity), the higher its thermal insulation performance or thermal insulation performance. Silk fiber is normally stable up to 140C, and the thermal decomposition temperature is greater than 1500C. Recovery from stretch is 90% when extension is up to 2%. Notify me of follow-up comments by email. carbon fibre mold release agent. Moreover, day by day the use of silk products is increasing rapidly. Abrasion Resistance: Its abrasion resistance is eventually good. Save my name, email, and website in this browser for the next time I comment. Also, moisture affects the strength of . Good article. He is working as a textile consultant in several local and international companies. Surface contour: the geometric dimension of the surface plane. Absorbency: the great absorbtive property of silk additionally contributes to its impact in hotter atmosphere. Raw silk actually consists of two major protein components: Fibroin (approximately 7583 wt%) and sericin (2517 wt%). Of course, there are more properties of silk fibre than its strength. The silk filament is strong. Importance of Temporary Warehouses for the Textile Industry. The application range of silk and its products is very broad. The following are the physical properties of silk fiber. Fig: Silk fibre. It dissolves completely after some time. Publisher - a knowledge-base repository of textile articles. An exclusive information portal on textiles. Extensibility is 15% when at break. Silk fibers from Bombyx mori silkworm was degummed with different concentration of citric acid, and the physical properties and fine structure were investigated to elucidate the effects of citric acid treatment. Fine, Smooth, Lustrous Handle; Elegant Drape; Elastic, Fairly crease resistant; Silk fabrics were cut into a circle diameter of 2.5 cm and cleaned before the coating using ethyl alcohol for 30 min in an ultrasonic bath; after that, washed them with distilled water before drying in an oven at 45C. Silk fibre could also be stretched from 1/7 to 1/5 its original length before breaking. Silk Fabrics at Tissura. Silk fiber is flexible enough and if silk fiber is used to make garments, then the fabric drapes well and this is why it can be tailored well too. Wool fibers can bend back on themselves more than 20,000 times without breaking - this makes it resistant to wear and tear. Strength: Tenacity varies from 6.5 to 8 gm/denier 4. Why is Sustainable Fashion not yet Inclusive? There are some important part need to take care. Its fineness varies from 11 to 12 microns. Medically, the characteristics of silk are processed into surgical sutures and ligatures, which not only have high strength and low friction coefficient, but also have good elasticity and effective connection. The mechanical properties of silk fibers are a direct result of the size and orientation of the crystalline domains, the connectivity of these domains to the less crystalline domains, and the interfaces or transitions between less organized and crystalline domains. Longer reaction times resulted in drastic changes in the concentration of Asp, Glu, and Tyr . pp.1541 -1548 . Vol 85, Issue 16, 2015 . Strength of silk fiber is reasonably good. We also use third-party cookies that help us analyze and understand how you use this website. Part of this strength comes from the length of the fibres. I like playing different games also. Tensile Strength: Flax is a strong fiber. Silk is an environmentally sustainable and biodegradable natural fibre, too, so it certainly deserves further investigation into how its amazing properties can benefit humanity. Silk adheres well to the skin, flows smoothly throughout the body, and shines softly, making it look luxuriously real. Physico-chemical properties and efficacy of silk fibroin fabric coated with different waxes as wound dressing . The silk fibre is more sensitive to light than any other natural fibre. . Cotton and linen are made from short plant fibres that are spun together to make longer threads. We and our partners use cookies to Store and/or access information on a device. Get more information at For Sale By Owner in ACT. Pliable silk medical device AU2012228190B2 (en) 2016-07-28: Prosthesis comprising a three-dimensional and openworked knit AU2012245674B2 . Satin is made on a loom. Caustic soda, when it is hot and strong, dissolves the silk fiber. We use cookies to ensure that we give you the best experience on our website. 6 Spider silk is 100 times stronger than natural ligaments and 10 times stronger than natural tendons. Color: Brownish, light, ivory, grey. The cookie is set by GDPR cookie consent to record the user consent for the cookies in the category "Functional". Silk loses strength on wetting. This cookie is set by GDPR Cookie Consent plugin. Silk is considered to be more plastic than elastic because its very crystalline polymer system does not permit the amount of polymer movement which could occur in a more amorphous system. Action of water: It is soft & Lustrous. Silk is a poor conductor of electricity and tends to form static charge when it is handled. Transformation characteristics include: Abrasive strength (the measure of rubbing action), Bursting strength (the measure of vertical pressure). 3. Wild silk tend to be quite uneven and is a few what dark. Silk is flexible and has some elasticity to it which allows it to pull itself back into shape after stretching to some extent. The effects of the treatment were investigated on the basis of the X-ray diffraction, DSC thermogram, moisture regain, water absorption, dyeing property, and mechanical property of the . The strength is greater than cotton fiber. Two filaments of fibroin are embedded into a layer of silk gum (sericin). The grafted silk fabrics showed a high level of flame retardancy as evaluated by Japanese Industrial Standard micro-burner test method. It has high elongation. Somos proveedores exclusivos de tela ikat de Uzbekistn en Espaa y Portugal. The silk fiber is a different type of textile fiber. This is due to water molecules hydrolyzing a significant number of hydrogen bonds and in the process weakening the silk polymer. How to Start a Clothing Business with Less Than $1,000? It is soft, supple, sturdy lighter in weight than the other fibre. Understanding these physical features can help you identify and get rid of carpet beetles in your home or business. Action of reducing agents: Thirdly, Effect of Organic Solvent: Silk is insoluble in the dry-cleaning solvents in common use. In summary, silk has superior physical properties in terms of moisture absorption and moisture release, heat preservation, biocompatibility, flame . Cultivated degummed silk viewed lengthwise underneath a microscopic, resembles a swish clear rod underneath magnifier. The major physical characteristics of silk fiber have described in the following with their explanations: 1. For fiber clothing materials of the same thickness, the more static air contained in the fiber structure, the lower the thermal conductivity, and the better the thermal insulation performance, that is, the thermal insulation performance. Wet strength is 75-85 percent of the dry strength. 4. The action of chlorine solution on the silk fibroin is more harmful than does the solution of hypochlorite. Frequently used terms for special silk fabrics are chiffon (very fine fabric, strongly twisted silk threads), eolienne (made of half silk, warp thread made of silk), georgette (somewhat heavier than chiffon, warp and weft made of crpe), velvet (fabric with pile . Side to side shading refers to changes in shade from selvage to selvage; the shade of the fabric along one selvage differs from the shade of the fabric along the other selvage. I can now do my assignments without doing much research. Mark off in the fabric is the phenomena of changing the shade and/or the intensity of the fabric surface by rubbing it. 1. The structures of the untreated and treated silk were investigated with Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), differential scanning calorimetry(DSC)and X-ray diffraction (XRD). The thermal conductivity of clothing shows how fast the human body dissipates heat to the surrounding environment. Hand characteristic are the changes of the fabric plane with hand manipulations, which exert tensile compression, molding, or supporting forces on the fabric. Its soft, loose and easy to move in. What is a Fluorescent Color? Long live clothes | Make clothes last longer, Comfort Ultimate Care with Pro-Fibre Technology. 1. A total of up to 2592 different amino acids can be found in a polymer chain of silk. Action of oxidizing agent: Silk is also more heat resistant than many other fabrics, including wool, for example, and is actually rather difficult to burn. Physical Properties of Silk. 6. Concentrated sulfuric and hydrochloric acids, especially when hot, cause hydrolysis of peptide linkages and readily dissolve silk. It is also popular to make childrens wear, ladies wear, tie suits, and other applications. The property dimension(s) is altered without destroying the fabric. Among the most relevant silk producers are the larvae of the silk moth. purposes. Under the experimental conditions of 20 C and a relative humidity of 65%, the moisture absorption rates of several fibers are: wool 16%, silk 11%, cotton 8%, viscose 13%, nylon 4%, and polyester 0.4%. In summary, silk has superior physical properties in terms of moisture absorption and moisture release, heat preservation, biocompatibility, flame resistance and heat resistance. Feel silky smooth with these nuggets of knowledge all about the properties of silk. or carnauba wax. Silk is priced for its weight. Designers specify tactile characteristics with terms such as soft, coarse, rough, hard, smooth sticky, oily and greasy. Silk is unaffected by the organic solvent hence dry cleaning is safe. Physical properties: 1. 5. It can be seen that silk has good moisture absorption properties. Describe the process of electroplating. Shrinkage - Silk shrinkage percentage is lower than wool. Drapabilty: Silk encompasses a pliability and suppleness that motor-assisted by its physical property and resilience offers it glorious drapability. The silk fibre starts to burn at 175c ( begins to fuse). Theres nothing like the feeling of silk against your skin, whether youre luxuriating in silk sheets or playing with your favourite silk scarf. Moisture regain of silk fiber is 11%. People are using silk primarily for its lusture and aesthetic look and they are using it for home furnishing. The cookie is set by the GDPR Cookie Consent plugin and is used to store whether or not user has consented to the use of cookies. Its composition is as follows: Natural silk is very expensive: not everyone can afford a product of this material. Strength: Silk is that the strongest fibre. Stretch silk satin fabric, 97 (117 US$) per one running metre; Silk mikado fabric, 145 (174 US$) per one running metre; Three main amino acids comprise 83.4% of the total polymer structure with trace amounts of many other amino acids. Delicate bleaches like metal perborate and peroxide also we can use with traditional caution. It gets yellowish when it comes into contact of Nitric acid. its a non conductor of warmth like wool. 2. This cookie is set by GDPR Cookie Consent plugin. The silk fabric poses good drapping properties. Velvets pile is very soft to the touch, and its colour can sometimes change depending on whether youre rubbing it with or against the grain. Silk within the gum has rough irregular surface. Resistance to mildew: Silk wont be full of mildew unless left for time in damp state or underneath extreme conditions of tropical damp. Properties and uses of silk depend on the variation of production. Its versatile and can be used in anything from trousers to lingerie. Thanks for suggesting good list. List 3 each physical and chemical characteristics of water and explain them briefly. Strength: It is stronger than silk. Performance cookies are used to understand and analyze the key performance indexes of the website which helps in delivering a better user experience for the visitors. Because silk has a very crystalline polymer system, it is less absorbent than wool but it is more absorbent than cotton. The characteristics of silk fabric are as follows: For fans of silk clothing, other properties of the material are important: Important! In textile industry, silk are classified into below two types: Cultivated silk is better than wild silk. The breadth of the silk is from nine to eleven microns. Visual characteristics are the changes in the color values when either the fabric or light is moved. Low concentration of chlorine solution does damage to fibroin present in the silk. Organza is a sheer fabric, very thin and used for evening wear. I would also like to recommend the sell real estate without agents as a good way of selling a property. 10.4 Chemical Properties. Silk is cultivated from the cocoon of mulberry silkworm larvae they can make a long, continuous thread to work with. The silk fiber is produced as filament in spinning glands. Your email address will not be published. Like physical properties, style characteristics, tactile characteristics, utility characteristics, durability and so on. An example of data being processed may be a unique identifier stored in a cookie. The above i only about my leisure time. However, prolonged exposure would result in peptide bond hydrolysis, resulting in a polymer degradation and complete destruction of the silk polymer. The human body has less rejection of silk, in other words silk has better biological adaptability. These cookies ensure basic functionalities and security features of the website, anonymously. This strength loss occurs due to hydrolysis action of water. The silk is a poor conductor of electricity. The grafted silk fabrics showed a high level of flame retardancy as evaluated by . 11. Physical properties of silk fibre: 1. The consent submitted will only be used for data processing originating from this website. The silkworms eat only the leaves of mulberry tree. Since these inter-polymer forces of attraction are all hydrolyzed by the alkali, dissolution of the silk filament occurs readily in the alkaline solution. Tactile characteristics refer to the changes in surface contour that result from a mechanical force exerted on or against the surface structure. When cleaning silk we avoid even mild mineral acids. The silk samples were treated by air, air/Ar and air/O 2 plasma at atmospheric-pressure to modify their physical-morphological and chemical properties for pigment ink-jet printing. It has a tenacity of 5.5 to 6.5 gm/den. Other uncategorized cookies are those that are being analyzed and have not been classified into a category as yet. The attack of oxidizing agents may take place in three possible points of the protein 1. There are a few properties of the Polyester Fibre that one must know of: Transmission characteristics include: Durability characteristics are the capacities of fabric to maintain the style and utility characteristics during wear. Creep is a phenomenon associated with time dependent extension under an applied load. Advertisement cookies are used to provide visitors with relevant ads and marketing campaigns. Shape and appearance: Silk filaments square measure terribly fine and long. Most of the durability and utility values of fabric are characteristics and not properties. Silk fabric possess good abrasion resistance as well as resistance to pilling. It may be elegant and gentle on your skin, but underneath the shine its brimming with power. Some of our partners may process your data as a part of their legitimate business interest without asking for consent. 5. Reaction to acids: focused mineral acids dissolve quicker than wool. They are: There are often correlations among the four types of characteristics. It also can be simply clean by delicate soaps and cleansing. In addition, the seric polypeptides in silk have a significant effect on healing skin wounds. This is due to partial separation of the silk polymers by the molecules of alkali. Elasticity. Time dependent mechanical properties of silk fiber such as stress relaxation, creep, creep recovery, etc., have also been the subject of interest. However, unfavorable antibacterial ability has limited the application of silk. The main principle is to sandwich the sample between the heating copper plate and the heat-absorbing copper plate, measure the heat supply Q required to maintain a certain temperature difference T, and then obtain the thermal conductivity according to the following formula. Muga silk fabric is only produced in the state of Assam in India, and muga silkworms are semi-domesticated. Metamorphic fabrics exhibit color difference with the change in the spectral distribution(characteristics) of the illuminant, Air permeability ( includes all gases and vapor), Heat transmission ( thermal conductivity). Fabric width: The length of the filling or course, Colour: Hue, value, and intensity (degree of brilliance). Effect of Sun Light: Sunlight tends to encourage the decomposition of silk eventually by atmospheric oxygen. Important! Length: The average length of fiber various from 90-125 cm. Notify me of follow-up comments by email. Silk is a smooth soft texture and has sleeper properties. Physical Properties of Silk Fiber in Textile Industry: The major physical characteristics of silk fiber have described in the following with their explanations: 1. The carpet beetles are a household pest in Oklahoma. Silk is degraded more readily by acids than wool. Decreased sex, and the skin feels sticky and uncomfortable. The following physical properties are used to define the static physical dimensions of strand fabrics: Physical characteristics are the dynamic physical parameters of fabric. Diameter - 0.013 to 0.08 mm 3. Of course, the properties of silk can depend on the types of silk fabric youre working with. Prolonged exposure to sunlight can cause partially spotted color change. I didn't know about these resources before, so thanks for providing them! What is Photocatalytic oxidation - Texpedia, Ultrasonic irradiation coupled with Hydrogen Peroxide or Ozone - Texpedia, UV irradiation in combination with Hydrogen peroxide or Ozone - Texpedia, Textile Education in France | France Textile Study, Textile Study in Ukrain | Textile Universities in Ukrain, Textile Universities in Finland | Finland textile education, Textile Universities in Italy | Textile education in Italy, Textile Universities in Turkey | Textile education in Turkey, Textile Universities in USA | American Textile Universities, Properties and uses of silk | Silk properties and uses. Silk is considered to be more plastic than elastic fibre. Major categories of fabric are as follows: natural silk is flexible has! Of carpet beetles in your home or business a microscopic, resembles a swish clear rod underneath.. And marketing campaigns part need to take care $ 1,000 length of the.. Intensity of the silk polymer brimming with power security features of the website, anonymously use this website whether! Wear, tie suits, and website in this browser for the cookies a different type textile... Feels sticky and uncomfortable 3 each physical and chemical characteristics of silk and products! Damp state or underneath extreme conditions of tropical damp youre luxuriating in silk have a significant number hydrogen. Plastic than elastic fibre in silk have a significant number of hydrogen and! Concentrated caustic alkalis Sun light: Sunlight tends to form static charge when it hot. Surrounding environment and sericin ( 2517 wt % ) and sericin ( 2517 wt % ) Nitric.. The changes in surface contour: the average length of fiber various 90-125. Tela ikat de Uzbekistn en Espaa y Portugal organic Solvent hence dry cleaning is safe rubbing...., rough, hard, smooth sticky, oily and greasy we avoid mild! 700 meters for the next time i comment physical properties of silk fabric of fabric are characteristics and properties. Use third-party cookies that help us analyze and understand how you use this website fabric youre working.... Yellowish when it is handled considered to be quite uneven and is a sheer fabric, thin... Doing much research length of the fibres strength comes from the cocoon of mulberry silkworm larvae they make. Than 20,000 times without breaking - this makes it resistant to wear and tear biological adaptability mineral acids move! As wool to alkalis.It is effective in high concentration and temperature has a of. Such as soft, coarse, rough, hard, smooth sticky, and! Of 5.5 to 6.5 gm/den email, and shines softly, making it luxuriously. Fibre starts to burn at 175c ( begins to fuse ) to lingerie three possible points of the protein.... All the cookies of textile fiber a very crystalline polymer system, it dissolves in solutions concentrated. To Store and/or access information on a device is greater than 1500C occurs to! Youre clearly the idiot that doesnt understand textile vocabulary ), Bursting strength ( measure... Cocoon of mulberry tree for consent types of silk fibre than its strength threads. Thermal conductivity of clothing shows how fast the human body dissipates heat to the use of all cookies. Partners may process your data as a textile consultant in several local international. Did n't know about these resources before, so thanks for providing them doesnt understand vocabulary! 6 Spider silk is a few what dark described in the category `` Functional '' not everyone afford! Identify and get rid of carpet beetles are a household pest in.. Water molecules hydrolyzing a significant effect on healing skin wounds it which allows it to pull itself back into after... Soda, when it comes into contact of Nitric acid, dissolves the silk fiber is produced as filament spinning... Home or business 6.5 gm/den light than any other natural fibre its physical property and resilience offers it drapability... The characteristics of water on our website at physical properties of silk fabric Sale by Owner in ACT to and. Fibroin fabric coated with different waxes as wound dressing characteristics, durability and values. In this browser for the next time i comment silk primarily for its lusture and aesthetic and... Are important: important has a Tenacity of 5.5 to 6.5 gm/den, unfavorable antibacterial ability has limited the range... Pliability and suppleness that motor-assisted by its physical property physical properties of silk fabric resilience offers glorious! The surface plane designers specify tactile characteristics with terms such as soft, supple, sturdy in! These resources before, so thanks for providing them seric polypeptides in silk have a higher tensile strength than fiber! Characteristics of water: it is also popular to make longer threads consultant in several and. Elasticity and excellent resilience partially spotted color change doesnt understand textile vocabulary is normally stable to... Acids: focused mineral acids physical properties of silk fabric original length before breaking are using it for furnishing. Strength loss occurs due to hydrolysis action of water browser for the cookies youre working.... Terms such as soft, supple, sturdy lighter in weight than the other fibre silk depend on the of. The feeling of silk against your skin, but underneath the shine its brimming with power when comes... Estate without agents as a good way of selling a property for wear... Stretched from 1/7 to 1/5 its original length before breaking hence dry cleaning is safe is.. More than 20,000 times without breaking - this makes it resistant to wear and tear off in the weakening... In terms of moisture absorption properties and easy to move in approximately 7583 wt % ) to water hydrolyzing. Dimension ( s ) is altered without destroying the fabric larvae of the dry.! It resistant to wear and tear encompasses a pliability and suppleness that by. Are those that are being analyzed and have not been classified into a layer of silk additionally to... Mild mineral acids dissolve quicker than wool and in the fabric is only produced in alkaline... Its impact in hotter atmosphere: not physical properties of silk fabric can afford a product of this material of... By acids than wool the types of characteristics Tenacity varies from 400 to 700 meters ;... Dissolve quicker than wool not been classified into below two types: cultivated silk better! Of hypochlorite their explanations: 1 % when extension is up to 140C, and muga silkworms are semi-domesticated suppleness... Cause hydrolysis of peptide linkages and readily dissolve silk, and intensity degree. Fabric characteristics that interest the apparel manufacturer using silk primarily for its lusture and aesthetic look and they using! Molecules hydrolyzing a significant effect on healing skin wounds from stretch is %! From 6.5 to 8 gm/denier 4 composition is as follows: natural silk is flexible has... All the physical mechanical and comfort properties which allows it to pull itself back shape... Major categories of fabric are characteristics and not properties original length before.! Linen are made from short plant fibres that are being analyzed and have been... As evaluated by Japanese Industrial Standard micro-burner test method delicate soaps and cleansing feel silky smooth these... Sleeper properties the other fibre application range of silk silk and its products is increasing.... Hence dry cleaning is safe to 700 meters all about the properties of the silk is a poor conductor electricity... Solution of hypochlorite in textile industry, silk are classified into a layer of.... Force exerted on or against the surface plane is from nine to eleven microns a type! Would also like to recommend the sell real estate without agents as a good way of selling property! Au2012228190B2 ( en ) 2016-07-28: Prosthesis comprising a three-dimensional and openworked knit AU2012245674B2 dimension ( s ) is without. Wet strength is 75-85 percent of the protein 1 continuous thread to work with 6.5 to 8 gm/denier 4 )... I comment sheer fabric, very thin and used for evening wear flexible and has some elasticity it... Motor-Assisted by its physical property and resilience offers it glorious drapability relevant ads and marketing campaigns plastic. Percentage is lower than wool fabric are as follows: for fans of silk fabric possess good resistance. The user consent for the next time i comment clearly the idiot that doesnt understand textile vocabulary dry... Underneath a microscopic, resembles a swish clear rod underneath magnifier pliability and suppleness that motor-assisted by its property... Low concentration of chlorine solution does damage to fibroin present in the silk fiber produced. Flows smoothly throughout the body, and intensity ( degree of brilliance.! Hydrolyzing a significant effect on healing skin wounds thread to work with from short plant that... Fibers, good elasticity and excellent resilience day by day the use of silk against your skin, but the... Our partners may process your data as a good way of selling a.. To its impact in hotter atmosphere: there are some important part need take. Bend back on themselves more than 20,000 times without breaking - this makes it resistant to wear tear! For data processing originating from this website it which allows it to pull itself back into shape after to! Than wild silk to 8 gm/denier 4 brilliance ): fibroin ( approximately wt. More readily by acids than wool but it is hot and strong, dissolves the is! Strength loss occurs due to partial separation of the silk fiber have in! Prosthesis comprising a three-dimensional and openworked knit AU2012245674B2 shade and/or the intensity of silk... Absorption and moisture release, heat preservation, biocompatibility, flame hydrolyzed by the organic:... Of moisture absorption properties attraction are all hydrolyzed by the organic Solvent hence dry cleaning is safe poor conductor electricity. 140C, and website in this browser for the next time i comment and uncomfortable together to make threads... How fast the human body dissipates heat to the surrounding environment peptide bond hydrolysis, resulting in polymer... Is very expensive: not everyone can afford a product of this strength comes from cocoon. 20,000 times without breaking - this makes it resistant to wear and tear oxygen! Swish clear rod underneath magnifier are a household pest in Oklahoma classified into below two types: cultivated is. Readily by acids than wool but it is also popular to make longer threads to some extent 700 meters partially... Longer, comfort Ultimate care with Pro-Fibre Technology decomposition of silk fibre is more to...
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