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Introduction:Coreopsis tinctoria Nutt. is an annual plant with small flowers in yellow and claret. In dyeing process, a whole range of colours can be obtained using various methods.

Introduction: Butterfly pea flower Clitoria ternatea L. belongs to family Fabaceae. The plant has many applications in various industries. The most important usage is in medicine and as a food dye. In Europe, it is almost unknown as a textile dye, unlike in Asian countries. Objective: The aim of the study was to assess the dyeing properties of textile materials made from protein fibres (sheep wool and natural silk) by water extract of Butterfly pea. Methods: Knitted fabric made from sheep wool and silk fabric were selected for testing. The colors of both textile materials using six dyeing methods were compared. Results: The colour palettes obtained from protein fibres - wool knitted fabric and silk fabric are totally different. The colours of wool knitted fabrics are warm beige, shades of olive, heather and yellow tones. The colours of silk fabric are shades of heather and lavender. Conclusions: The dyestuff obtained from Clitoria ternatea L. flowers is suitable for dyeing protein fibres. Naturally dyed fabrics and knitted fabrics made of protein fibres increase the attractiveness of products made of these materials. [ABSTRACT FROM AUTHOR]

Introduction: Indian madder (Rubia cordifolia L.), is an important natural dyeing plant with long history. Rubia belongs to the family Rubiaceae. It is one of the oldest dyeing plant with a source of beautiful and permanent shades of red. The compounds found in the plant’s roots are an excellent natural dye for dyeing protein fibres. The ingredients contained in the root of the plant have numerous health-promoting effects on the human body, both internal and external. In this study water extract from the plant roots was tested to obtain different colours on protein fibres. Objective: The aim of the study was to assess the dyeing properties of East Frisian sheep wool by water extract of R. cordifolia roots. Methods: In this research wool from the East Frisian sheep breed were selected and compared the colours obtained on this wool using six dyeing methods. Results: The results indicate that the type of mordants used affects the intensity and colour of the wool after dyeing. Wool samples dyed without any treatments and with various mordants show different intensity of colour in the red colour range (cinnabar red, brick red, raspberry, tomato red, Tuscan red). Conclusions: Indian Madder R. cordifolia plant is an efficient raw material that gives intense colours on wool in range of red. [ABSTRACT FROM AUTHOR]

The study explored the impact of the hydrodynamic degumming process applied for decorticated monomorphic flax on fiber quality. The experiment was designed as the first stage of research leading to the development of a method for decorticated flax fiber elementarization and cottonization; in particular, effectively dividing the fiber bundles to ensure low linear density and reducing impurities in the content, to make the fibers suitable for cotton spinning systems. The degumming process of the decorticated fibers covered hydrodynamic disposal of the gluing substances, mainly pectins from the fibers, with use of a specially designed lab-scale Model Device for Physical Degumming of the Flax Fibers. The degummed fibers were tested for linear density, length, impurity content and chemical composition by thermogravimetric analysis combined with the analysis of evolved gases (Fourier transform infrared spectroscopy) and analysis of images of fiber cross-sections and longitudinal views from a scanning electron microscope. The study outcomes allowed us to determine the optimal parameters of the degumming process applied for decorticated flax fibers, in which the obtained fibers were of the highest quality. It was found that the optimal parameters of the process were a bath temperature of 30°C and a degumming process duration of 24 hours. These lab-scale process conditions were used in further work on the degumming process of flax fiber carried out on a semi-technical scale, followed by a mechanical cottonization of the fiber, at the final stage of the technological chain. [ABSTRACT FROM AUTHOR]

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