The mahogany shade is noted for good grey blending because its medium-brown base plus copper-red warmth deposits enough pigment to mask the translucent look of unpigmented strands. For best coverage, apply to dry or towel-dried hair and leave the shampoo on for the full recommended processing time (typically 10–20 minutes — check the package leaflet for the exact range). The longer contact time lets the direct dyes saturate the more resistant cuticle of grey hair. If you have a high percentage of grey (over 50%), the result will read as a warm reddish-brown highlight rather than a solid opaque colour, which many users find more natural than a flat permanent dye. For stubborn white hairs, a second application a few days later can deepen the deposit without the damage risk of repeated peroxide use. Always do a patch test 48 hours before the first full application, and protect the hairline with a barrier cream or petroleum jelly to avoid skin staining.
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