Jf. Corbett, An historical review of the use of dye precursors in the formulation of commercial oxidation hair dyes, DYE PIGMENT, 41(1-2), 1999, pp. 127-136
The changing palette of precursor used in commercial oxidation hair dyes ov
er the period 1900 to 1997 is reviewed. Reasons for changes in the palette
are discussed in the light of regulatory and patent activity together with
comment on the changes in the paradigm for patentability of combinations of
known ingredients in known generic combination. (C) 1999 Elsevier Science
Ltd. All rights reserved.