الفهرس 
AcknowledgmentOnly 14 pages are availabe for public view
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Abstract
The aim of this work is to find apossibility of introducinga n9w method of hair dyeing.A thorough research in each of thefollc.wing b-ranche,s was required. 1. Hair.~ The structute, constitution, histology and colour-
ing materials of the hair have been s~udied in addition to a com- parative analysis of human hai~, skin (leather) and wool. / 2. Dyes.Schematic tables illutstrating and classifying
groups of dyes in a~cordance with their method-of application andchemical compo$itions have been -developed.
choice of the most suitable ’functional
requirments.
to facilitate the groups fitting hair
3.Hair dyes •• A great care has been devoted to exAmine all
hair dye~ that had been recorded up to date though in a panoramic
view still detailed enough to indicate both advantages and disad-
vantages of each type of hair dye.
According to the present study the coupling of diazotisedamines on hair has been selected to be the functional
the newly developped method of hair dyeing.
group of A complete survey• covering the Azo dye group including the ’”
methl:.ds 0 f di azot i sat i ’:’n and cl::>upl i ng reel’: t ions was n.ecessary.
The experimental part of this paper consists of:1. Bleaching hair samples using the best method of blea2~- 2. Prcldu.ction and application of the conventional type ofhair dye on hai’r samples, ”flat is the ()xidation dye
3. Prciduction and application of the newly developed methodbased on coupling of diazonium compound on hair.
4. Microscopical examination of hair after dyeing with bothpreviously mentioned met~ods of dyeing, that is, the conventionaloxidation method and the newly developed metl,•.d based on .:oupl ing of diazotised amine on hair. 5. Measuring the ’physical properties of hair before and
after dyeing.
During the procedure two difficulties arose:.a) The diazotisatioil reaction itself required drasti.: c.~ndi-
tions such as operating un~er Doe
b) The diazonium .comp~uhds once prepared were susceptible to rapid decomposition