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تاريخ درج: 6/4/95   carpetour


Article:
Using Derivative Spectrophotometry to Determine the Relation between Color Intensity and Dye Concentration of Madder




Using Derivative Spectrophotometry to Determine the Relation between Color Intensity and Dye Concentration of Madder
    Sarvenaz Ghanean*1, Mansoureh Ghanbar Afjeh*2

    
    
Sarvenaz Ghanean
Sarvenaz Ghanean

    1.Ph.D student, Department of Textile Engineering, Amirkabir University of Technology. P. O. Box 15875-4413, Tehran, Iran. E-mail: sarvenaz.ghanean@gmail.com. Tel: +98 9121324942.
    
    2. Assistant Professor, Department of Textile Engineering, Amirkabir University of Technology. P. O. Box 15875-4413, Tehran, Iran, E-mail: ghanbar@aut.ac.ir. Tel: +98 2164542605.
    
    Abstract
    The Derivative Spectrophotometry usually improves resolution bands, eliminates the influence of background and provides more defined fingerprints than original spectra, since it enhances the detectability of minor spectral features. In this work different madder types were collected and applied for dyeing woolen yarns used in Persian carpet in the same pre-mordanting and dyeing process with different amount of dye. The second derivative of the Kubelka-Munk function of dyed samples has been calculated and implemented for eliciting a function that relates the color intensity of madder used in dyeing of Persian woolen carpets to dye concentration. It was found that for all selected madders an exponential function could be appropriately adjusted to control this relation. Thus the concentration of madder used in an unknown woolen yarn could be approximately determined with the fitted function.
    
    Keywords: Color Intensity – Derivative Spectrophotometry – Kubelka-Munk Equation – Madder.

    
    

    
    
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