Showing 8 results for Dyeing
Dr Majid Montazer, Mr Saied Ahankoob,
Volume 1, Issue 1 (3-2006)
Abstract
Ammonia is a weak base that can be used as an swelling agent on wool fibres before dyeing. In this study the pretreatment of wool with ammonia in different percent solutions (5, 10, 15, 20) is carried out, and its effect on dye-ability of wool by natural dyes such as madder, walnut shell, pomegranate peel, vine leaf, white and red onion skin, is analyzed. Also the effects of temperature, length of time, and concentration of ammonia on dye-ability of wool fibres were considered. Colorimetric data, and measurements of light and washing fastness were carried out, and the results of color change under ammonia treatment are reported.
Dr. Ahmad Akbari,
Volume 2, Issue 2 (6-2006)
Abstract
New nanofiltration membranes were produced in the form of unfilled fibers through the photopolymerization method. Parastyrene sodium sulfonate was used as the vinyl monomer to reform the polysulphone ultra-filtration membranes. The modified membranes were used to purify colored solutions of three different pigments consisting acidic, reactive and direct (suitable for dyeing pile yarns and warps), in order to refine and reuse the pigment solutions. The effect of various parameters like pressure, electrolyte, time, and the kind of pigment on the extent to which the pigment is confined and the flux of the membrane outflow was assessed. Results showed that besides the effective function of bleaching, the problem of barred pores observed in most commercial membranes built of polyamide also reduced significantly in the new membranes.
Dr. Majid Montazer, Mr Saeid Zarineh,
Volume 2, Issue 3 (9-2006)
Abstract
The influence of urea as an additive in dyeing of wool with madder was evaluated in this work. A different concentration of urea was applied on wool yarns before, during and after dyeing of samples. The treated samples were tested for dye absorption at different time, wicking, sinking, wash and light fastness and surface morphology by scanning electronic microscope. The results show that urea is an effective additive in dyeing of wool by madder by increasing the dye absorption. Adding of urea ranging 50% to 250% on weight of fibers leads to swell the wool fibers however, increasing the urea percent to 300% may damage the fiber surfaces and reduces the fiber strength.
Mr Mohammad Reza Shahparvari, Dr Seyed Jalal-Eddin Bassam,
Volume 7, Issue 19 (9-2011)
Abstract
Every year, during rose water extraction a huge amount of damask rose residue is produced. The transportation and disposal of these waste materials create some problems including an increase in the price of the produced rose water. In this study the use of damask rose residues in dyeing wool is assessed and a method for its use as a colorant in natural dyeing is offered. Dyeing was carried out by using the material along with some mordants such as alum, copper sulphate, iron sulphate, chlorine and tin and also without mordant by adopting pre-mordanting technique. Various amounts of mordants and colorants were used. Comparing the obtained color hue with those from other traditional colorants, it was observed that the color hue obtained from damask rose residues was greatly similar to the color hue gained from pomegranate peel. These two color hues were analyzed and compared using the carpet weavers’ views as well as measuring wash and light fastness properties using experimental methods. The results indicate that damask residues can be used as a new natural colorant particularly in carpet production. This can provide a new colorant with minimum expenses, reduce the price of rose water extraction, and prevent environmental pollution.
Mrs Robabeh Taghizadeh Borujeni, Dr Ahmad Akbari, Mr Abdolsalim Gharehbaii,
Volume 11, Issue 28 (3-2016)
Abstract
Today, much research is conducted on the use of new methods of dyeing textiles, all of which are trying to select an appropriate method of reducing the usage of energy and chemicals in a way to produce cost-effective products with an acceptable uniformity. One of these methods is the use of ultrasonic waves. Since the dyestuff is extremely limited by the plant cell membrane, extraction methods such as ultrasonic ones can better improve the mechanism of extracting natural dyes and dyestuff out of cell membranes and also improve the transfer of dyestuff onto fibers’ dyeing process in order to assist in conservation of natural resources,
The aim of this study is to use ultrasonic waves in the extraction of dyestuff of walnut shell and to dye wool fibers with the extract. Favorable results are obtained compared to conventional screw. By calculating the absorption efficiency with conventional ultrasound method, it was concluded that the use of ultrasonic waves can increase the concentration of the dye in solution more than the conventional method and by increasing the concentration of the dye in both methods, this factor is increased. According to the findings, it is concluded that ultrasonic extraction method is more efficient than the usual one. To investigate the effects of ultrasonic method in the dyeing process, the productivity of ultrasonic method in dyeing was calculated in relation to conventional method in two modes of (UU) and (UC). The productivity of (UU) in relation to (UC) was % 13/77. Various mechanical aspects are included to achieve the positive effect of the use of ultrasonic waves in dyeing process such as degassing of fiber, stimulation of dyeing solution, rapid spread of dyestuff on fiber and breaking the gathering of dyeing molecules. These cause a higher influence of the dyestuff in the fibers and a sheer deep dye. Measurement of stabled samples results show that the stability of the samples in both ultrasonic and conventional methods, has been fair to good. The results of the SEM analysis clearly presents this conclusion. Creating a kind of surface erosion and degradation scales, which led to greater influence and power of color dye into the fiber, increases the effects of cavitation. They are considered to be seen in the SEM images.
Mr Mohammad Reza Shahparvari, Dr Siyamak Safapour, Dr Kamaladin Gharanjig,
Volume 13, Issue 32 (3-2018)
Abstract
To increase the color range of textile. Dyeing is to be done with more than one color-shedding substances, However before the conduction of Dyeing with the form of combining color-substances, the capability and probability of the combination, that is to be tested with the scale of degree in compatibility, has to be considered.
Bearing in mind the necessity of producing a high range of color in hand-woven carpet and importance of compatibility in dyeing materials, this research is looking for the extent of compatibility in color, substances including: Madder, weld, Prangos ferulacea and walnut shell on woolen thread, Raw and mordanted with aluminum sulfate as one of the means of estimating compatibility
The result has shown that the dyeing capability in woolen thread with walnut shell in comparison with three other color shedding substances is variable. thus the similarity in extent of compatibility in three color- shedding substances: Madder substances: madder weld and Prangos ferulacea shows the high compatibility they have in common.
However differences in the diagram of dyeing of walnut shell shows little compatibility of these substances in getting combined with madder, weld and Prangos ferulacea.
After the calculating the capacity of dyeing in each of coloring substances woolen thread (on the basis of even combination of four dyeing substances with three different ratio) was dyed. The result shows that dyeing compatibility in Madder, weld and Prangos ferulacea in combination with each other is good to excellent in diagram. While combination of walnut shell with three other color substances caused very low compatibility. In addition to that, results show the effect of density and using dents in coloring.
On the whole result of this research have shown that dyeing substances madder weld and Prangos ferulacea have high compatibility with each other and have combination compatibility in the same range while possibility of combining three substances with walnut shell, duo to low compatibility is very low. The way of conducting this research is pragmatic and gathering of all the information is laboratory and library-based.
Mrs Seyedeh Akram Oliyaei Tabaei, Seyed Mohammad Mahdi Mirzaamini,
Volume 14, Issue 34 (3-2019)
Abstract
Fars province is one of the centers for producing handmade carpets. This Province according to the division in the nomadic section Includes: Three tribes of Qashqai, khamseh and lor. And distributed north to south of the province in various urban and rural areas. This makes fars province one of the most valuable place in carpet waeving in Iran and a carpet exporter in the world. Climate type and climatic conditions of this province cultivate various species of plants in the land, each of which combines with each other and different mordant , creates a variety of colors in the dyeing of fibers. This research is aimed at discovering the events and memories of the dyeing process, the type of color choices and the taste of rural and nomadic Persian weavers by oral history method.Oral history is in fact a consciously dialogue between two people about the dimensions of past events, both of which have historic significance and recorded to become a document and its durability. Oral history, as a research method from the beginning to the end, involves numerous, long, and timely stages. Which, if it meets its standards, will have tremendous results . And its purpose is merely to record the lost historical documents, such as memories, experiences, and knowledge of people directly related to the topic in question. This process, in this research, was conducted through interviewing and away from any interference with and application of the researcher's personal views, merely to record the memories of individuals. In this qualitative research, Semi-structured interview tool was interviewed with 42 factors of rural and nomadic carpet Fars. Sampling method was selected as snowball or incremental and sample size based on theoretical saturation. Dyeing of fibers in Fars tribes was done annually in the spring and after wool picking and washing the fibers. These tribes usually used of plants that are in their tripes, which is why it is possible that one of the reasons for the darkness of carpets in the Arabian and eastern parts of Fars with carpets of Qashqai tribes and western regions, the same difference in the type of plants available to them. Fars province was one of the areas that used of chemical dyes after many years later. As the tribesmen did not know the proper dyeing process with these chemicals, they were treated like natural dyes, and sometimes they used natural teeth to fix it, which did not affect the color of the dye. Therefore, they do not wash their woolen linen, which are painted with chemical dyes, and usually replace and sell it after several years of use. Until in the 1970s, several producers such as Seyyed Razi Miri, Gholamreza Zolanvari and Abbas Sayyah re-tried to revive natural and vegetative dyes, and now the province has the most use in using these dyes in its nomadic and rural productions.
Saeedeh Rafiei, Davood Shadlou,
Volume 17, Issue 40 (9-2021)
Abstract
In the last decade, biocompatible natural dyes with antimicrobial properties have been given much attention to protect dyed fibers in handwoven carpets against microorganisms. In this research, the leaves of 6 native plants of Fars province, including Amygdalus scoparia (Arjan), Pistacia atlantica (Baneh), Carica Ficus, Shirazi thyme, Shirazi Askari grape (Vinifera) and Juglans, were used as natural dyes for wool dyeing in the presence of eight different metal mordants. The reflective spectra of the dyed samples were analyzed by a reflective spectrophotometer. In addition, the color characteristics, the brightness of the dyed samples, the variety of color shades in the presence of different mordents, washing and light fastness as well as the antibacterial properties of the dyed wool were evaluated. The results of reflection spectroscopy showed that dyed samples with the leaves of Argan, grape, thyme and fig plants had negative a* and positive b* values, which confirms their green and yellow undertones, While, dyed samples with the leaves of baneh and Juglans trees had positive a* and b* values, which proves the red and yellow undertones of these samples. Wool fibers dyed with Argan leaves, figs and thyme in the presence of different metal teeth created the most variety of colors. Ivory, cream, green, brown, olive, orange, brick and purple colors were created on wool fibers in the presence of the leaves of these plants along with different mordents. The light and washing fastness of dyed samples with all the mentioned dyes were acceptable. Wool dyed with thyme and Pistacia atlantica leaves extract showed the maximum percentage of inhibition (99%) against two types of bacteria, Escherichia coli and Staphylococcus aureus.
