Hair dyeing compositions are provided which comprise at least one coupler selected from N-aryl-m-phenylenediamine derivatives, 2-substituted N-aryl-m-phenylenediamine derivatives, and N-aryl-m-diaminopyridine derivatives, in combination with and at least one diaminopyrazole primary intermediate.

 
Web www.patentalert.com

> Methods for determining the relative benefits and/or evaluating quantitative changes of products on epithelial tissue

~ 00397