Textiles, Dyeing, and Finishing

Mahltig, Boris; Rabe, Maike; Muth, Mathias

doi:10.1002/0471238961.0609140903011201.a01.pub2

Cited by 6 publications

(5 citation statements)

References 88 publications

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“…This description was done for a lecture on the topic textile finishing, also containing the topics coloration, dyeing and printing. The content of this finishing lecture is in good accordance with the text book of R. H. Wardman and the review paper of Mahltig et al [7,8]. A comparison of this digital lecture was done with the examination results of the former nine years (period 2012 to 2020) [6].…”

Section: Introductionmentioning

confidence: 59%

Comparison of conventional and digital lectures and examinations with respect to the conditions after COVID-19 period – an example for a bachelor lecture on textile finishing

Mahltig

2023

cdatp

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Due to the appearance of COVID-19, many lectures and examinations at universities are forced to digital formats. In the first post-pandemic semester again, the change from digital to conventional lectures was demanded. By this background the question arises, what is the better format for lecture and exam – digital or conventional? This question is discussed on the example of a bachelor lecture on textile finishing for the time period from 2019 to 2023. The combination of digital lecture and digital exam leads to strong participation numbers and by this to more successfully passing students. If the exam is done as conventional written text, the influence if the lecture is digital or conventional is weak. Also, the numbers of passing students or the finally achieved mark are mainly not dependent on the type of lecture format. Finally, it can be state that a digital lecture is more successful if there are also digital parts in the examination. Also, the return to conventional lectures and exams after the pandemic period is possible without influencing the student performance compared to pre-pandemic situation.

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Section: Introductionmentioning

confidence: 59%

Comparison of conventional and digital lectures and examinations with respect to the conditions after COVID-19 period – an example for a bachelor lecture on textile finishing

Mahltig

2023

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“…While historically natural dyes are used for the coloration of textiles, nowadays in most industrial production processes synthetic dyestuffs are used [1][2][3][4][5]. Prominent examples are acid dyes used for nylon fibers, reactive dyes for cotton or disperse dyes for polyester fiber materials [4,6].…”

Section: Introductionmentioning

confidence: 99%

Overview on natural dyes and their IR-spectra – Part I: Plant based dyes with naphthoquinone and anthraquinone structure

Mahltig

2024

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This is the first paper of a series of review articles reporting on natural dyes, their origin and infrared spectra (IR spectra). One aim of this review series is to compare IR spectra of natural dyes from different origin and discuss if this spectroscopic method can be used as versatile tool for the identification of natural dyes and their origin. This part I of the review series is related to four natural dyes based on the chemical structures of naphthoquinone and anthraquinone. Especially discussed are Lawson, juglone and alizarin, which are related to the natural products henna, walnut hull and madder root. Also, the natural dye based on alkanna root is investigated. Compared are the IR spectra of these natural dyes gained from different suppliers with the IR spectra of the pure chemical substances related to the natural dyes. A discussion with spectra from literature is supported. The aim of this review paper is to support infrared spectroscopic data of natural materials (natural dyes) to enable further material identification and also quality control supporting people working in the fields of fiber analytics or with production processes using natural dyes

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“…The dominance of synthetic dyes compared to the use of natural dye stuffs is caused by several factors, such as availability, cost issues, and excellent fastness properties [1,4]. Prominent examples for great washing fastness are the application of reactive dyes on cotton or disperse dyes on polyester fabrics [1,[5][6][7][8][9]. However, the trend in favor of fully bio-based and biodegradable materials is spreading, and through this, the consumer demand for natural products is increasing [10,11].…”

Section: Introductionmentioning

confidence: 99%

Wood Extracts for Dyeing of Cotton Fabrics—Special View on Mordanting Procedures

Mai,

Grethe,

Mahltig

2024

Textiles

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Natural dyes offer a bio-based opportunity to support the attractive coloration of textile fabrics made from natural fibers like cotton, wool, hemp, and many other textile materials. They can be part of a strategy to realize fully bio-based textiles and clothing materials. In line with this statement, the following study investigates the use of wood extracts for dyeing cotton fabrics. Specifically, extract powders of logwood (Haematoxylon campechianum L.), brazilwood (Caesalpinia spp.), and quebracho wood (Schinopsis lorentzii) are used. The aim of the study is to evaluate which colorations can be obtained by the application of those wood extracts and what fastness properties are reached. For this, different modified process parameters and mordants are evaluated. The dyeing process is modified using different mordants based on iron and aluminum salts. These mordants are applied in pre-, meta-, or post-mordant procedures. The color and fastness properties of prepared textile samples are determined by spectroscopic measurements, color measurements, washing procedures, and a Xenotest for measuring the light fastness. Ultimately, it is shown that a broad range of colorations can be realized through different combinations of wood extracts and mordanting procedures. Notably, stronger color depths are reached with pre- and meta-mordanting compared to post-mordanting. Good wash fastness is obtained for some color shades. However, with post-mordanting, better wash fastness can be achieved. The light fastness of the realized samples is only moderate to low. In conclusion, it can be stated that dyes from wood extracts are excellent materials to dye natural fibers if they are combined with the right mordanting agent in pre- or meta-mordanting procedures. The present study is therefore a good proof-of-concept for the realization of fully bio-based colored textile materials.

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Textiles, Dyeing, and Finishing

Cited by 6 publications

References 88 publications

Comparison of conventional and digital lectures and examinations with respect to the conditions after COVID-19 period – an example for a bachelor lecture on textile finishing

Comparison of conventional and digital lectures and examinations with respect to the conditions after COVID-19 period – an example for a bachelor lecture on textile finishing

Overview on natural dyes and their IR-spectra – Part I: Plant based dyes with naphthoquinone and anthraquinone structure

Wood Extracts for Dyeing of Cotton Fabrics—Special View on Mordanting Procedures

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