Browsing by Author "Vaseva R.K."

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    On the synthesis and application of some mono- and dis-azo acid dyes
    (2016-01-01) Miladinova P.M.; Vaseva R.K.; Lukanova V.R.
    The present paper describes the synthesis of two novel mono azo dyes of a yellow colour and four novel dis-azo dyes of orange and red colours. The dyes are obtained by the commonly accepted procedure - diazotization and coupling reactions. The compounds are isolated and characterized by TLC (Rf values), UV/Vis and IR spectra and conformed by proton NMR spectroscopy. The dyeing performance of the dyes obtained is evaluated on wool fabrics where their fastness properties of washing, rubbing and perspiration are determined in view of their exhaustion and fixation. The results obtained show good to excellent fastness properties on wool.