The use of agricultural waste is becoming more common with the spread of awareness of sustainable life. In the present study, different concentrations (10 gr/L, 15 gr/L, 20 gr/L) of aqueous extracts ...were obtained from tomato (Solanum lycopersicum) leaves as agricultural waste and fabrics containing 100% wool were coloured with these extracts by using infra-red dyeing machine. Aluminium, iron and copper based mordants, which are frequently used in natural dyeing, were added to the extracts. After dyeing process, colours in alluring brown, green and yellow tones were obtained in the fabrics. According to the spectrophotometer measurements, colour yield (K/S) of the samples increased proportionally with increasing concentrations. Washing and rubbing fastness of the dyed wool samples were good, except for the samples dyed with iron-based mordant added extract.
After manufacturing the natural dyed actual size Hanji using 11 kinds of plant natural dyeing materials and 2 kinds of animal natural dyeing materials, the color characteristics and color change and ...color fastness after post-mordanting were compared and discussed. The hues of 13 types of natural dyed Hanji were black, PB, and RP, each with 1 type, YP with 3 types, and Y with 7 types. Among the natural dyeing materials, Chinese ink, indigo and Lac showed high color yield and color difference, and violet-root cromwell and gardenia seeds showed low color yield. The color fastness of Hanji dyed with turpentine diluted Ottchil, Pagoda tree seeds, Chinese ink and indigo was excellent, while that of gardenia seeds and violet-root cromwell were very poor. After post-mordanting of natural dyed Hanji with Al, Cu, and Fe mordants, the hue changes were show up the Alnus firma, clove, lac and cochineal. In addition, the color difference was very diverse and was overall the most biggest due to Fe mordant. After 72 hr. of UV irradiation on post-mordanting natural dyed Hanji, hue change was observed in 3 types and color fastness was improved in 8 types by post-mordanting. The Hue and color fastness are significantly different depending on the type of natural dying materials and post-mordants. Therefore, when dyeing Hanji with natural dyes, it is necessary to dye with sufficient knowledges and informations about the desired color and fastness.
Purpose The purpose of this study is to extract and characterize a novel natural dye from the leaves of Lannea coromandelica and the extraction with finding ways of dyeing cotton fabric using three ...mordants. Design/methodology/approach The colouring agents were extracted from the leaves of Lannea coromandelica using an aqueous extraction method. The extract was characterized using analysis methods of pH, gas chromatography-mass spectrometry (GC-MS), Fourier transform infrared (FTIR), ultraviolet-visible (UV-vis) and cyclic voltammetry measurement. The extract was applied to cotton fabric samples using a non-mordant and three mordants under the two mordanting methods. The dyeing performance of the extracted colouring agent was evaluated using colour fastness properties, colour strength (K/S) and colour space (CIE Lab). Findings The aqueous dye extract showed reddish-brown colour, and its pH was 5.94. The GC-MS analysis revealed that the dye extract from the leaves of Lannea coromandelica contained active chemical compounds. The UV-vis and FTIR analyses found that groups influenced the reddish-brown colour of the dye extraction. The cyclic voltammetry measurements discovered the electrochemical properties of the dye extraction. The mordanted fabric samples showed better colour fastness properties than the non-mordanted fabric sample. The K/S and CIE Lab results indicate that the cotton fabric samples dyed with mordants showed more significant dye affinities than non-mordanted fabric samples. Originality/value Researchers have never discovered that the Lannea coromandelica leaf extract is a natural dye for cotton fabric dyeing. The findings of this study showed that natural dyes extracted from Lannea coromandelica leaf could be an efficient colouring agent for use in cotton fabric.
In this study, silk fabrics were treated with Atmospheric Pressure Glow Discharge (APGD) plasma in the air at a discharge voltage of 35 kV and frequency of 20 kHz. C.I. (Color Index) Natural Yellow 3 ...was used as a natural dye. The effect of APGD plasma treatment time on the dyeability and colour fastness of silk fabrics has been investigated. The influence of plasma treatment on the surface morphology of silk fabric was characterised using Scanning electron microscopy. X-ray photoelectron spectroscopy measurement showed that the content of nitrogen and oxygen increased with the increasing APGD plasma treatment time. Attenuated Total Reflection Fourier Transform Infrared spectroscopy was used to characterise the functional groups such as -OH, -NH and -COOH on the surface of silk fabrics. The dyeability of silk fabrics was increased obviously after APGD plasma treatment, and the colour fastness of the dyed samples was satisfactory.
When the imagination conjures up an image of an Egyptian mummy, it is normally one of a human body wrapped with undyed linen bandages. However, the reality was much more colourful, as shown by the ...set of red mummy shrouds and textile fragments from Pharaonic Egypt considered in this work. The textiles were subjected to scientific investigation with the main aim of shedding light on the sources of red colour and on the possible reasons for the different levels of colour fading. The red colourants were investigated using various non-invasive and micro-invasive approaches. The results pointed towards the presence of three sources of red colour, which, in increasing order of lightfastness, are safflower (
), madder (
spp.), and red ochre. Micro-morphological observations and elemental analyses also enabled some hypotheses to be formulated regarding the application of these colourants to the textiles. The results not only deepen our knowledge of dyeing technologies in ancient Egypt and shed new light on the function of red shrouds and textiles as part of the funerary practices of Pharaonic Egypt, but are also essential in planning the display and future preservation of these mummies and their associated textiles.
This research compares the change of physical and chemical properties of three types of agro-residual (AgR) fibres namely banana plant stem fibre (BSF), pineapple leaf fibre (PALF) and corn husk ...fibre (CHF) by wet processing steps: scouring, bleaching and dyeing. Bleaching operation was performed using mild sodium chlorite concentration. The percentage of lignin and hemicelluloses were remarkably declined and densities of the fibres were increased. The highest amount of α-cellulose is found 88.7% for bleached BSF, followed by bleached PALF (78.4%) and bleached CHF (70.1%). The morphology changes of the fibres due to bleaching were clearly detected by FTIR spectroscopy. The bleached fibres were dyed with two different types of reactive dyes viz. Reactive Orange 2 R-XF and Reactive Blue F-R by conventional dyeing technique. The absorption of dyes was tested by UV-vis spectroscopy. It was seen that the dye absorption percentage of all types of fibre are not equal. The dye absorption was also diverged in the case of two reactive dyes. Colour fastness properties of dyed fibres were tested under sunlight, wash and reagent spot tests. All the dyed fibres were exhibited excellent colour fastness properties. Reactive Orange 2 R-XF showed better fastness property than Reactive Blue F-R in every investigation.
•Multi-frequency study on augmentation of henna hair dye using ultrasound.•Henna hair dyes damaged the cuticle layer of the hair.•Ultrasound augmented colour uptake and intensity with shorter dyeing ...times.•Exposure to longer periods of ultrasound effected the hair morphology.•400 kHz performed better than 44 and 1000 kHz in these conditions.
Advances made in recent years have allowed the application of colorants obtained from natural sources into textile dyeing. The use of ultrasound in the dyeing method is reported to increase dye uptake and decrease dyeing times. The aim of this work is to further extend the knowledge of natural hair dyes considering the use of ultrasound in the dyeing method with commercially available herbal dyes and using goat hair as a model for human hair. Optimal ultrasonic parameters were selected by considering the effects of sonication times (5, 10 and 15 min), frequencies (44, 400 and 1000 kHz) and total dyeing times (30, 60 and 120 min) in the morphology of the dyed hair and the colour intensity. Damage to the hair surface was evaluated by scanning electron microscopy (SEM) images, differences in colour of the dyed hair was obtained by ImageJ analysis and quantification of dye uptake was determined by UV–visible spectroscopy. The evidence from this study suggests an increase in goat hair coloration with the use of ultrasonic energy. Optimal dyeing conditions in consideration of colouration efficacy without hair damage were identified as sonication at 400 kHz for 10 min with a total dyeing time of 60 min.
Fabrics made of 100% cotton and 100% flax respectively were exposed at ambient temperature to gamma radiation doses, from 5 to 40kGy, using a Co-60 research irradiator. After the irradiation ...treatment the fabrics were subjected to dyeing process with Itodye Nat Pomegranate commercial natural dye. The influence of gamma irradiation treatment on the physical-mechanical properties, dyeing and surface morphology of natural fibres were investigated. Gamma ray treatment of 40kGy was the most effective in the case of fabrics made from 100% cotton, enhancing the colour strength as evidenced by K/S value. The results obtained from the mechanical properties of fabrics made of 100% flax indicated that the dose of 40kGy leads to a decrease of tensile strength up of to 41.5%. Infrared spectroscopy was used to monitor chemical and structural changes in cellulosic fibres induced during processing. Crystallinity indices calculated from various bands ratio showed insignificant variations for cotton and small variations in the case of flax. The surface morphology of irradiated cotton fabrics did not show significant changes even at the highest dose of 40kGy, while the low doses applied on flax fabrics led to an appearance of small changes of surface morphology. The gamma irradiation increased the uptake of natural dyes on natural cellulosic fibres.
•Gamma irradiation increases natural dye uptake on cotton and flax fibres.•At 40kGy for 100% cotton fabrics the colour strength increase is maximum.•Cotton and flax crystallinity indices shows insignificant and small changes in turn.•Cotton and flax surface morphology shows insignificant and small changes in turn.•The resistance at break decreases up to 41.5% at 40kGy for 100% flax fabrics.
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