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This paper aims to scrutinize the change in physical and chemical properties of cotton knitted fabric with a variety of shade depth (1% to 8%) dyeing with reactive dyes. Shade percentage is an important factor which has various impacts on 100% cotton knitted fabric. The technical factors of GSM, color fastness to rubbing, bursting strength test, co...
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The aim of this project work is to study on the application method of OBA on 100% cotton knitted fabric. Single jersey cotton knitted fabric (160 GSM) was treated with OBA in one bath exhaust method varying the concentration of OBA from 0.5 to 5%. The samples were then tested for determination of absorbency, whiteness index and reflectance value. F...
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... Colorfastness and color strength are terribly crucial facts just in case of coloured textile material that is intimately regarding varied coloring parameters viz. concentration of dye, salt, alkali, and dyeing temperature [3,4]. In the present work, the effect of concentration of reactive dye (light, medium, and dark), and the structures on colorfastness and GSM were scrutinized. ...
This paper aims to investigate the change in Gram per Square Meter (GSM) and fastness properties of cotton knitted fabric with a variety of fabric structures and shade% dyeing with reactive dyes. Here are presented the changes of GSM and fastness value from pretreatment to finishing and compared the theoretical values with the calculated ones. To complete this research work, Plain S/J, Single Lacoste, 1X1 Rib, and Interlock fabrics were dyed with three different shades (light-0.422%, medium-0.936%, and dark-4.88%). Different properties of knitted fabric were tested i.e. rubbing fastness, wash Fastness, perspiration, weight per unit length, etc. It is seen that as an average about 10 to 41% GSM is changed from grey stage to the finishing stage for the mentioned fabric structures. So GSM variation is possible because of shade percentage and structures. In case of fastness properties wash and perspiration are superior, whereas rubbing fastness is moderate for both fabric structures and shade %.
... For dyeing of cotton goods reactive dyes are so much suitable and extensively used and whereas dyeing of polyester goods disperse dyes are used in the textile dyeing industries due to have good colour fastness properties and a wide range of shade can be achieved by these dyes [9,10,11]. Because, the fastness properties of cotton knitted fabric are affected by its shade percentages [12]. ...
... Studies found that while introducing of seawater as a reactive dyeing media, the dyed fabrics give comparatively lighter shade along with no significant difference for various colour fastness parameter compared to ground water dyed sample. As the parameters of sea water dyed samples remain unchanged, so it may encourage the use of sea water as reactive dyeing media on a larger scale [12,13,14]. ...
Water is the ultimate and mostly used media during textile materials processing, especially in colouration. This study investigated the possibilities of using seawater for cotton and polyester fabrics dyeing. Single jersey fabrics made of 100 percent cotton and polyester were dyed using a standard recipe and two separate water source as dyeing mediums. It has been focused on the assessment of colour fastness to wash, perspiration, saliva, rubbing, water, light and colour difference value due to compare the efficiency of dyeing media. The results revealed that the cotton fabric dyed with seawater showed lighter shade than that of ground water sample. But for polyester fabric darker shade was obtained compared to ground water. The cotton sample dyed with sea water carried about 15% higher colour strength than ground water dyed sample but for polyester it was very negligible, only 3%. Moreover, the results of colour fastness to wash, perspiration, saliva, rubbing, water and light for seawater dyed samples of cotton and polyester were shown satisfactory outcomes having the grading of 4-5 in most of the cases. This exploration established that commercial dyeing processes were robust and can be practically trans-ferable into the seawater medium for cotton and polyester fabrics.
Cotton fabrics were dyed with natural tannin and post‐treated with a metallic salt mordant and/or sol‐gel coating. The effects on colour properties and hydrophobicity were studied. Pad‐dyeing was carried out using a reddish‐brown, tannin‐rich dye. Some samples were then post‐mordanted with iron(II) sulphate. Samples were sol‐gel coated using tetraethyl orthosilicate (TEOS) with small amounts of organically modified alkoxysilane precursors phenyltriethoxysilane (PHY) and n‐octyltriethoxysilane (OCT) to impart hydrophobicity, and with 3‐(glycidoxypropyl)‐trimethoxysilane (GLY) to improve adhesion between the coating and the fabric. The colour parameters were analysed in the CIELab colour space. Dyed samples appeared reddish‐brown, with the exception of those post‐mordanted with iron(II) sulphate, which were dark brown. Sol‐gel coating with hydrophobic alkyltriethoxysilanes (PHY or OCT) increased the hydrophobicity of the undyed fabrics, increasing contact angle values and drop absorption times. However, this hydrophobic sol‐gel coating alone failed to impart hydrophobicity to the dyed fabrics. Post‐mordanting with iron(II) sulphate was more effective in improving the hydrophobicity of the dyed fabrics than sol‐gel coating. Only the dyed sample treated with both iron(II) sulphate and OCT completely prevented absorption of water droplets. Sol‐gel coating was found to improve colour fastness to washing, light, and crocking. Post‐mordanting with iron(II) sulphate improved colour fastness to washing and light, but not to crocking.
