http://space.buft.edu.bd/handle/123456789/15 Sat, 22 Nov 2025 13:05:22 GMT 2025-11-22T13:05:22Z http://space.buft.edu.bd/handle/123456789/110 The Influence of Fabric Weight in the Enzymatic Process (Depilling) of Cotton Knitted Fabric Mondal, Moni Sankar; Haque, Md. Mahbubul Enzymes are gaining an increasingly important role as a tool in various wet textile pretreatment and finishing processes (Stanescu, 2002; Thiry, 2001; Cavaco-Paulo, et al. 1998; Heine and Höcker, 1995)[12]. Within 5 to 10 years, wet textile production processing will be shifted from conventional wet textile pretreatment and finishing procedures substantially towards sustainable processes, because of increasing governmental and environmental restrictions and the decreasing availability of fresh water. We analysed the influence of enzymatic treatment process(depilling) using an acid cellulase enzyme on the different weight of cotton knitted fabrics(single jersey) at different time duration and find that depilling effect vary with fabric properties such as density of the fabric which is related with GSM of fabric. The action of enzyme hydrolysis was studied by pilling grade and fabric strength loss percentage. Sun, 01 Dec 2013 00:00:00 GMT http://space.buft.edu.bd/handle/123456789/110 2013-12-01T00:00:00Z http://space.buft.edu.bd/handle/123456789/109 Treatment of Coffon With Chitosan - An Initiative Towards Salt Free Dyeing Bhuiyan, M.A. Rahman; A.H. Kafi; M.A.Hannan; Shaid, Abu This paper presents the possibility of salt free dyeing of cotton fabric with reactive dye by treating the fabric with chitosan. In the experiment the fabric was treated with chitosan of different concentrations (1%, 2%, 3% & 4%) before dyeing. The chitosan treated fabric was then dyed with reactive dye without using salt. The dyeing performance and the fastness of shade have been analyzed by comparing the chitosan treated dyed samples with corresponding similar fabric samples dyed with salt. The dye absorption, i.e. K/S value, of chitosan treated fabrics was found as 1.6, 1.7, 2.2 and 2.9 respectively for 1%, 2%, 3% and 4% chitosan concentration whereas the K/S value of untreated fabric was 1.9. Though the fabric with lower chitosan concentration may not absorb dyes as much as the fabric dyed with salt, but when the chitosan concentration in fabric is increased, it is quite possible to obtain similar dye absorption or even better than that the fabric dyed with salt. Color fastness to washing, rubbing and perspiration were also analyzed. In case of washing and perspiration, chitosan treated fabrics have shown almost similar fastness ratings to untreated dyed fabrics. However untreated fabrics have shown better rubbing fastness specially wet rub. Sun, 01 Dec 2013 00:00:00 GMT http://space.buft.edu.bd/handle/123456789/109 2013-12-01T00:00:00Z http://space.buft.edu.bd/handle/123456789/108 Effect of Maturity on Reflectance Percentage of Bleached and Dyed (Reactive Dye) Cotton Fibre Rahman, Syed Atiqur; Nahar, Khairun; Mahmud, Kauser; Lizza, Jannat Ara Maturities of five cotton fibre samples were measured in Hazi Hashem Spinning Mills Ltd, Narayongonj, Bangladesh on 21 July, 2011. Scouring, bleaching and dyeing of these cotton samples were performed in Delta Knit Composite Ltd., Gazipur, Bangladesh on 30 July, 2011. Reflectances of bleached and dyed samples were measured in Cotton Club (BD) Ltd, Gazipur, Bangladesh on 31 July 2011. It was found that with the increase of maturity, the reflectance percentage of both the bleached and dyed cotton fibres were increased up to a certain value then again decreased for comparatively high matured fibres. The increase of reflectance % are due to the increase of cellulose content in the primary and secondary cell wall whereas lowering of reflectance % after a certain maturity may be due to the formation of interior layer (consisted of mineral salts and proteins) adjacent to the lumen thus reducing the relative amount of cellulose content per unit mass of fibers. Sun, 01 Dec 2013 00:00:00 GMT http://space.buft.edu.bd/handle/123456789/108 2013-12-01T00:00:00Z http://space.buft.edu.bd/handle/123456789/107 Perfect Shade Matching in Dyeing by Using Only Colortools (Datacolor spectrometer) Kamal, Md. Anwar Though Textile Trade has been developed in the world on 114 BC, but after long time, during twenty first century, shade matching according to buyer approval has become a vital task. In dyeing factories it's a difficult task to match completely according to the buyer's given approval. Spectrometer can help a great for matching. Datacolor brand has already become a popular name in this trade. It has two softwares--- Colortools and DCIMatch. In Colortools, it shows dl*, da*, db* etc. that means amount of depth, amount of reddish/greenish and amount of yellowish/bluish respectively. But it does not explain how exactly shade should be matched to the standard. In DCIMatch, by taking correction recipe, a very correct recipe can be obtained. But it needs development of database for some years and also this DCIMatch is expensive. In Bangladesh around 60% of factories buy only Colortools. Here I have shown some result of my research, using that formula anyone can give a very useful correction recipe from result of Colortools. Sun, 01 Dec 2013 00:00:00 GMT http://space.buft.edu.bd/handle/123456789/107 2013-12-01T00:00:00Z