Nattaya Punrattanasin

Ecological dyeing of silk fabric with lac dye by using padding techniques

This research focuses on silk fabrics exhibiting different colour values and fastness properties. The samples were prepared by dyeing with lac as a natural colourant. Two padding techniques were used in the process, namely, the pad-batch and pad-dry techniques, under different conditions. Aluminium potassium sulphate, ferrous sulphate, copper sulphate and stannous chloride were used as mordants. The effects of differing dye concentrations added to the silk fabrics using a pre- and post-mordant method were studied and recorded. The colour fastness to washing, light, rubbing, water and perspiration of the dyed samples was performed according to the present ISO standard. Silk fabric dyed without mordant showed a pink shade, while those samples mordanted with stannous chloride and aluminium potassium sulphate displayed noticeably brighter red coloured shades. With the additional use of copper sulphate, the colour shade produced was violet, while darker grey shades were obtained by adding ferrous sulphate mordant. The test results regarding fastness properties ranged from fair to very good, while wash fastness ranged from very poor to poor.

Dyeing Studies with Eucalyptus, Quercetin, Rutin, and Tannin: A Research on Effect of Ferrous Sulfate Mordant

Natural dyes from Eucalyptus leaf extract, quercetin, rutin, and tannin were applied to silk fabric by pad-batch and pad-dry techniques under different conditions. Ferrous sulfate was used as a mordant. The dyeing properties were evaluated by measuring K/S and CIELAB values. In addition, the different fastness properties were evaluated. The effect of dyes at different concentration levels with respect to their colour strength was also studied.

Eco-Dyeing of Silk Fabric with Garcinia Dulcis (Roxb.) Kurz Bark as a Source of Natural Dye by using The Padding Technique

Silk fabrics were put through a process of dyeing with natural colorants extracted and used from the bark of the Garcinia dulcis (Roxb.) Kurz. Two padding techniques, pad-batch and pad-dry, were used under different study conditions. The effects of mordant agents used on the fabrics and the natural colorant in the dyeing process, color values, color strength, and the fastness properties of silk fabric were investigated and the results recorded in the following study. The results showed that color values can be changed using various metallic salts as mordants. The fastness properties ranged from fair to very good, while perspiration and light fastness was poor to fair.

UV Protection and Fastness Properties of Silk Fabric Dyed with Garcinia dulcis (Roxb.) Kurz Bark by Using Pad-Dry Technique. A Focus on Effect of Mordant Concentration

This research was concerned with dye extraction from the bark of Garcinia Dulcis (Roxb.) Kurz and with the application of this dye for silk fabric dyeing by the pad-dry process. Silk fabrics dyed with Garcinia Dulcis (Roxb.) Kurz bark extract showed a pale yellow shade, while those dyed with alum and stannous chloride bright yellow and light yellow colour, respectively. Silk substrates dyed with CuSO4 gave a yellowishgreen colour, while those dyed with FeSO4 had a dark brown colour. The colour fastness to rubbing after dyeing the silk fabric treated with the mordant was investigated, the results of which showed fair to good fastness. The results confirmed that natural dyes from Garcinia Dulcis (Roxb.) Kurz bark extract have potential applications for fabric dyeing and producing ultraviolet (UV) protective silk fabric.

An Evaluation of Silk Fabric Dyed with Lac Dye by Using Pad-Dry Technique - A Research on Effect of Mordant Concentration

A natural dye extracted from lac was applied to a silk fabric by the use of pad-dry technique under different conditions. The dyeing properties were evaluated by measuring K/S and CIELAB values. In addition, the different fastness properties were evaluated. The effect of dyes at different mordant concentration levels with respect to their colour strength was also studied. Silk fabrics dyed with lac extract showed a light pink shade, while those dyed with alum and stannous chloride pinkish-red colour. Silk substrates dyed with CuSO4 gave a purple red colour, while those dyed with FeSO4 had a reddish-gray colour. The fastness properties ranged from fair to good, while washing fastness was poor level.

Investigation of Ultraviolet Protection Properties of Cotton Fabric via Azoic Dyeing with Green Tea Extract

Green tea dyeing of cotton fabric via azoic combination method was investigated in order to improve ultraviolet protection properties without the application of polutting metal mordants. Three types of diazonium salts were prepared from three different primary aromatic amines (aniline, p-nitroaniline and 2,4 dichoroaniline) and subsequently, reacted with pretreated cotton fabric with coupling component or polyphenolic compounds found in green tea extract to form an azo dye inside the cellulose matrix. The result showed that as the strength of electron withdrawing groups of the substituents in the primary aromatic amines increase, both color strength and ultraviolet protection factor (UPF) of dyed fabrics dramically increased.

Dyeing Properties of Nylon Fabrics with Mangrove Bark Extract via Mordanting Methods

A natural colorant obtained from extraction of mangrove bark was applied on nylon fabrics via exhaustion process. Colorimetric data (CIE L*, a*, b* and K/S) were evaluated. Pre-, meta-and post-mordanting with different metal mordants (aluminium potassium sulfate, ferrous sulfate, copper sulfate, and stannous chloride) were also investigated. The colorant extracted from mangrove bark shows affinity to nylon fabric dyed without mordants. The highest color yield and uniform dyeing were obtained with post-modanting method.

The Effect of Alum, Ferrous, Stannous and NaCl on Silk Fabric Dyed with Natural Dye from Laccifer Lacca Kerr

In this research, the dyeing behavior of silk fabrics with lac was studied. The effect of different mordants concentration (potassium aluminium sulfate or alum, stannous chloride, ferrous sulfate and sodium chloride) with simultaneous mordanting procedures using pad-dry and pad-batch techniques on colour characteristics of the dyed samples was investigated. The colour fastness tests were washing and light of the dyed samples, the test results were determined according to the present ISO standard.The results show that silk fabric dyed without and with stannous chloride and sodium chloride mordant gave a shade of light pink, while those mordanted with aluminum potassium sulfate, had noticeably pink shade. The colour shade was light grey shades was obtained by adding ferrous sulfate mordant. The washing fastness property showed very poor level, while light fastness was fair level.

Natural Dye from Garcinia dulcis (Roxb.) Kurz Bark and Application on Silk Fabric by Using Pad-Batch Dyeing: A Study on Mordant Concentrations Efficiency

The dyeing and fastness properties of silk fabric dyed with natural dye extraction from the bark of Garcinia Dulcis (Roxb.) Kurz by the pad-batch process was studied. The effect of dyes at different mordant concentration levels on their colour strength was also investigated. Silk fabrics dyed with Garcinia Dulcis (Roxb.) Kurz bark extract showed a pale yellow shade, while those dyed with alum and stannous chloride bright yellow and light yellow colour, respectively. Silk substrates dyed with CuSO4 gave a yellowish green colour, while those dyed with FeSO4 had a dark brown colour. The fastness properties showed fair to good rating, whereas the colour fastness to perspiration was at a poor level.

Cold-Pad-Batch Dyeing of Silk with Laccifer lacca Kerr. and Garcinia dulcis (Roxb.) Kurz Bark

Cold-pad-batch technique of silk dyeing fabric with two natural dyes (Laccifer lacca Kerr. And Garcinia dulcis (Roxb.) Kurz bark) using pre-mordant are performed using 3 different mordants namely, alum, tartaric acid and ferrous sulfate. The study showed that color intensity (K/S) slightly increased when the batching time increased from 1 to 24 hours. Dyed silk fabrics have different color shades depending on the types of mordant applied. Ferrous sulfate and alum was found to be the best mordants for improvements of color depth. Various fastness properties (wash, crock and light) of the dyed silk fabrics have also been investigated.