Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 88 for “"Dyeing"”.
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Phenolic reactions for leather tanning and dyeing
… between the polymers and the protein. For dyeing of hide powder, the lignin degradation products were reacted with laccase (a polyphenol oxidase); 2-methoxyphenol gave the darkest colour. These products have potential to be used as raw materials for tanning and dyeing of animal skins. …
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Dyes and Dyeing Methods in Late Iron Age Finland
… textile fragments. The aim is to identify the dyeing methods used in Finland during the Late Iron Age and to find the locally used dyestuffs. This dissertation focuses on the archaeological samples from inhumation burials and shipwrecks, which were analysed with visual analysis and microscopy …
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Application of Lean Six Sigma in Textile Yarn Dyeing.
North Carolina State University Theses Textile Engineering, Chemistry and Science.
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Ozone treatment of a selected textile dyeing and finishing wastewater
… the effect of ozone upon a selected textile dyeing and finishing wastewater, with primary emphasis placed on noting the effect of ozone on the color of the wastewater. The parameters measured during the study included color, chemical and five-day biochemical oxygen demand, pH, dissolved …
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Physicochemical and biological treatment of a textile dyeing and finishing wastewater
Wastewaters from textile dyeing and finishing industries are often high in color, organic matter, metals and toxicity. Treatment is usually required before discharge into a sewer or body of water. Pretreatment often consists of chemical coagulation to remove color and solid matter. Aerobic …
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Strategies for economically sustainable resist dyeing industries in Abeokuta, Ogun State, Nigeria
… aim to examine the challenges facing the resist dyeing<br/>industries. The research method is divided into three: Theoretical- this involves using<br/>secondary data from books, journal, newspaper, and the web to gather background<br/>information; Statistical- this involves the use of …
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Pretreatment and biodegradation of wastewater from a textile dyeing and finishing industry
… color and reducing the organic load of textile dyeing and finishing wastewater. Subsequent aerobic treatment is often employed to complete organic removal as well as remove toxicity and metals. The wastewater from the textile dyeing and finishing industry studied was not treated efficiently and …
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Development of optimal dyeing methods with natural dyes for environmentally friendly hemp textile
… purpose of this study was to develop a natural dyeing process for natural fibers that improved wash fastness. It focused on the formulation for dyeing with natural colorants, optimization of the dyeing techniques, and development of the best procedure. This research used a full factorial design …
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Examination of variables that affect dyeing of acetate in a three dye system
… an AATCC experimental laboratory procedure for dyeing acetate. Evaluation of color measurement from test samples and transmission, an indicator of dye exhaustion, from final dyebath was focused on reproducibility of color from dyeing to dyeing and maximum dye exhaustion. Experimental effects …
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The effect of process conditions, time, temperature, and rates of temperature rise, on the exhaustion of disperse dye on polyester yarn under high-temperature dyeing conditions
… dye on polyester yarn under High-Temperature dyeing conditions was investigated. Two ply spun type Dacron 54 polyester yarn was dyed with Disperse Red 60 in 0.5 g/l dye bath concentration using an Ahiba Texomat Dyeing Apparatus under High-Temperature Dyeing conditions. The dyeing process …
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A Comparative Study of the Environmental Impacts of Standardized Dyeing Systems Using Natural and Synthetic Dyes on Knitted Cotton Fabric.
North Carolina State University Theses Fiber & Polymer Science.
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Färben im Ultraschallfeld sowie aus überkritischem Kohlendioxid als alternativem Färbemedium
… to increase the efficiency of the conventional dyeing process using ultrasonics or to replace the conventional dyeing medium water with supercritical carbon dioxide, saving water and energy costs to realize an ecological and also an economical profit. Using ultrasonics (approx. 10W/cm2) in a …
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Carrier concentration and dye type effect on carrier and dye uptake of dacron type 54 yarn in disperse dyeing of polyester
… of 490 denier weighing ten grams was obtained. Dyeing was done using the Ahiba Texomat dyeing machine. The standard composite curves and equations were established for both dyes as well as the carrier. The dye in the yarn was extracted with dimethyl formamide as a solvent using the Fisher …
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The influence of power ultrasound on leather processing
… effects of ultrasound (38 kHz, 1.3 W cm2) on the dyeing, fatliquoring and tanning of leather have been investigated and the mechanisms whereby ultrasound influences these processes were elucidated. Compared with a conventional process, ultrasonic dyeing can either shorten the dyeing time by 40-70% …
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The development of a laboratory procedure for dyeing nylon knits, for reproducibility of shades and levelness, using a mixture of three dyes
… colorfastness and acceptable levelness of dyeing (2). Because of the great amount of nylon used in knitwear and the consumer demand for higher quality, the problems associated with nylon have become increasingly important...
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The development of a laboratory procedure for dyeing nylon knits, for reproducibility of shades and levelness, using a mixture of three dyes
The study was conducted to determine congruence in the role of principals of vocational-technical centers in Virginia as perceived by principals, superintendents, and teachers. Twenty-three out of the 24 vocational-technical centers in the state were included in the study. There were 23 …
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