Do a patch test 48 hours before bleaching
Do a strand test to check timing and results
Gather supplies: bleach powder, developer, toner (optional), shampoo, conditioner, gloves, bowl, tint brush, clips, petroleum jelly (optional), timer
Use non-metal tools and a non-metal bowl
Protect skin: apply petroleum jelly around hairline and ears (optional)
Wear gloves and mix bleach powder with developer per product instructions (typically 1:1, but follow label)
Apply bleach to dry, unwashed hair unless your product label says otherwise
Start application on the back/sides first, then the top, then the front
Work quickly and evenly, saturating hair from roots to ends or using your chosen method
Avoid overlapping already-bleached sections for too long
Check progress every 5–10 minutes
Stop when hair reaches pale yellow level for toner (or desired level for your goal)
Rinse thoroughly with cool or lukewarm water
Shampoo gently to remove all bleach
Apply conditioner or a bond-supporting treatment
Tone if needed: mix toner with developer per label and apply to damp hair for the recommended time
Rinse, then shampoo gently again
Apply a deep conditioner or bond treatment after toning
Avoid heat styling and harsh products for 24–48 hours
Do not bleach again until hair is strong enough; wait at least 1–2 weeks or follow product/hairstylist guidance
If hair feels overly elastic, gummy, or breaks easily, stop and seek professional help