How to Get Hair Dye to Better Adhere to Gray Hair: A Hairdresser Reveals the Secret That Solves the Problem

TL;DR

Gray hair's smooth, closed structure makes it difficult for dye pigment to penetrate.
Pre-pigmentation involves applying 3% or 6% hydrogen peroxide to dry gray strands for 10 minutes before dyeing to open the cuticle.
After pre-pigmentation, hair should be blow-dried without rinsing before applying dye.
A 6% hydrogen peroxide (20 vol) is typically used for gray hair as it opens the cuticle without excessive lightening.
Start dyeing the most gray-prone areas (around the face, crown) where the color needs to stay the longest.
Extend the dye's processing time by 5-10 minutes beyond the instructions (total around 45 minutes) unless otherwise specified.
Gentle warming of the hair with a hairdryer while under a shower cap can help the cuticle open faster.
Use sulfate-free shampoos and masks for colored hair to prevent premature fading.

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