To begin, you need to analyze the hair carefully to determine several factors that will influence the hair’s willingness to accept color. What is the percentage of grey hair? Is there one completely grey area surrounded by pigmented or partially pigmented hair? What is the texture and level of the pigmented hair if any? All of these factors must be considered. You should apply the color, with brush or bottle on very thin sections of hair, thin enough to see thru, and totally saturate these sections. When formulating with the pHormulate System for natural shades, drop one level in the N series and process at room temperature for 30 up to 45 minutes using pHormulate 20 Volume color developer in most cases.
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