Physical and chemical investigations on natural dyes

Acquaviva, S.; D'Anna, E.; De Giorgi, M. L.; Della Patria, A.; Baraldi, P.
August 2010
Applied Physics A: Materials Science & Processing;Aug2010, Vol. 100 Issue 3, p823
Academic Journal
Natural dyes have been used extensively in the past for many purposes, such us to colour fibers and to produce inks, watercolours and paints, but their use declined rapidly after the discovery of synthetic colours. Nowadays we witness a renewed interest, as natural dyes are neither toxic nor polluting. In this work, physical and chemical properties of four selected dyes, namely red (Madder), yellow (Weld and Turmeric) and blue (Woad) colours, produced by means of traditional techniques at the Museo dei Colori Naturali (Lamoli, Italy), have been investigated. The chromatic properties have been studied through the reflectance spectroscopy, a non-invasive technique for the characterisation of chromaticity. Reflection spectra both from powders and egg-yolk tempera models have been acquired to provide the typical features of the dyes in the UV-vis spectral range. Moreover, to assess the feasibility of laser cleaning procedures, tempera layers were investigated after irradiation with an excimer laser. Micro Raman spectroscopy, Scanning Electron Microscopy and Energy Dispersive X-Ray analyses have complemented the survey, returning compositional and morphological information as well. Efforts have been made to give scientific feedback to the production processes and to support the research activity in the restoration of the artworks where these dyes were employed.


Related Articles

  • IDENTIFICATION, QUANTIFICATION AND ELIMINATION OF WHITE SPECK DEFECTS ON DYED COTTON FABRICS. Goynes, W. R.; Bel-Berger, P. D.; Blanchard, E. J.; Ingber, B. F.; Graves, E. E.; Dastoor, P.; Von Hoven, T. M. // Book of Papers, National Technical Conference of AATCC;1996, p9 

    The authors discuss the results of their study on the identification, quantification and reduction of white speck defects on dyed cotton fabrics. Using scanning electron microscopy (SEM), the white speck defects were found clinging to a fabric surface and have structures that look similar to...

  • Evanescent wave absorption spectroscopy using multimode fibers. Ruddy, V.; MacCraith, B. D.; Murphy, J. A. // Journal of Applied Physics;5/15/1990, Vol. 67 Issue 10, p6070 

    Presents a study that performed evanescent wave absorption in an aqueous dye solution by using multimode fused silica fiber. Background on attenuated total reflection spectroscopy; Equation for the power transmitted by an optical fiber whose cladding has been replaced locally by an absorbing...

  • Effect of atmospheric air DBD plasma on the surface of polyester/fibran fabric before printing. Rashed, U.; El-Sayad, H. S. // Colourage;Oct2007, Vol. 54 Issue 10, p76 

    DBD plasma treatment is applied to PE/F fabric in atmospheric air at various discharge power levels and exposure times. Its effect on the bulk fibre structure, fabric properties and surface morphology has been investigated. Whiteness, wettability, tensile strength and colour yield are highly...

  • The Effect of Supercritical CO2 Dyeing Conditions on the Morphology of Polyester Fibers. Drews, M. J.; Jordan, C. // Textile Chemist & Colorist;Jun98, Vol. 30 Issue 6, p13 

    Very little has been published about the effects, if any, supercritical CO2 dyeing may have on either fiber morphology or fiber properties. Extensive research into the use of supercritical CO2 for analytical applications has indicated that polyester (PET) fiber structure could be affected under...

  • SOME OBSERVATIONS ON THE EFFECTS OF SELECTED DYE CARRIERS ON POLY(ETHYLENE TEREPHTHALATE). Ravichandran, V.; Wilde, M.; Gadoury, D. R.; Lemley, A. T.; Obendorf, S. K. // Book of Papers, National Technical Conference of AATCC;1986, p107 

    Several mechanisms have been proposed to explain carrier - fiber interactions. One concept that has received little attention is the effect of carriers on fiber wettability. Poly(ethylene terephthalate) [PET] fabrics were pretreated with selected carriers - salicylic acid, anthranilic acid and...

  • Influence of Low-Temperature Dyeing Process on Physical Properties and Surface Morphology of Cashmere Fibers. Qian Li; Long Li; Jingfeng Shao // Journal of Engineered Fabrics & Fibers (JEFF);2012, Vol. 7 Issue 1, p58 

    A low temperature dyeing process of cashmere has the advantages of saving energy and causing less damage to fibers. In this paper, the tensile properties of dyed cashmere by low-temperature dyeing and conventional dyeing were tested using a single fiber tensile tester. The surface morphologies...

  • Issue information.  // Journal of Raman Spectroscopy;May2017, Vol. 48 Issue 5, p623 

    No abstract is available for this article.

  • Analysis of the structure of multi-component carbon films by resonant Raman scattering. Marcus, B.; Fayette, L.; Mermoux, M.; Abello, L.; Lucazeau, G. // Journal of Applied Physics;9/15/1994, Vol. 76 Issue 6, p3463 

    Deals with a study which characterized diamond and carbonaceous films grown in a microwave assisted plasma reactor by x-ray diffraction, scanning electron microscopy and Raman spectroscopy. Experimental details; Results and discussion.

  • Enhancement of Treatment Efficiency of Recalcitrant Wastewater Containing Textile Dyes Using a Newly Developed Iron Zeolite Socony Mobil-5 Heterogeneous Catalyst. Ahmad, Mushtaq; Asghar, Anam; Abdul Raman, Abdul Aziz; Wan Daud, Wan Mohd Ashri // PLoS ONE;10/30/2015, Vol. 10 Issue 10, p1 

    Fenton oxidation, an advanced oxidation process, is an efficient method for the treatment of recalcitrant wastewaters. Unfortunately, it utilizes H2O2 and iron-based homogeneous catalysts, which lead to the formation of high volumes of sludge and secondary pollutants. To overcome these problems,...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics