Hair concern · 10 steps · 2 min read · Updated 29 October 2026

How to care for blonde and bleached hair?

Bleach lifts natural pigment by opening the cuticle and breaking down melanin, which also removes some of the proteins and lipids that keep hair strong. Blonde hair therefore needs two things: strength to limit breakage, and toning to stop the warm, yellow or orange undertones from creeping back. Here is the routine:

01
Wash Less, and Sulfate-Free
Bleached hair is porous and loses moisture fast. Wash two or three times a week with a sulfate-free shampoo in lukewarm water, and condition every time.
02
Tone with Purple or Blue Shampoo Weekly
Purple pigment cancels yellow; blue cancels orange on darker blondes. Use it once a week, leave it for the time on the bottle and rinse well. Overuse can leave a dull, lilac tinge.
03
Use a Bond Builder
Bleaching breaks disulfide bonds inside the hair. A bond-building treatment once a week helps restore strength and reduce snapping, especially in the first weeks after lightening.
04
Deep Condition Every Week
A rich mask on the mid-lengths and ends replaces lost moisture. Leave it for 10 to 20 minutes; on very porous hair, apply to damp rather than dripping-wet hair so it is not diluted.
05
Always Protect from Heat
Bleached hair has less margin for error. Use a heat protectant, keep tools under 170 °C and dry on medium. Air-dry when you can.
06
Shield from Sun and Chlorine
UV fades toner and dries the hair; chlorine and copper in pools turn blondes green. Wear a hat, use a UV-protective spray, and before swimming wet the hair and coat it with conditioner so it absorbs less pool water.
07
Rinse Cool and Avoid Hard Water Build-Up
Cool rinses smooth the cuticle for shine. If your water is hard, a clarifying or chelating shampoo once a month removes the mineral film that makes blonde look dull.
08
Refresh with a Gloss or Toner
A salon gloss or an at-home demi-permanent gloss every four to six weeks keeps the tone even and adds shine between colour appointments.
09
Space Out Bleaching
Lightening regrowth every six to eight weeks, and only the regrowth, limits overlap on already-bleached hair. Overlapping is the most common cause of breakage and "chemical haircuts".
10
Trim Regularly
Split ends show more on blonde hair. A trim every six to eight weeks keeps the ends clean and the colour looking expensive.

Before you go

Going from dark to very light blonde in one session is where most damage happens. A good colourist will lift in stages and may refuse to go lighter if the hair cannot take it. Trust that advice; stretched over a few appointments, the result is brighter and the hair stays on your head.

Frequently asked questions

How often should I use purple shampoo?

Once a week for most blondes, or whenever you notice warmth returning. Using it every wash can over-tone and leave the hair looking ashy or dull.

Why does my blonde turn brassy?

Bleach exposes the underlying warm pigment, and the toner that covers it washes out over time, faster with sun, chlorine, hot water and harsh shampoos. Toning shampoos and glosses replace what washes out.

Can I bleach my hair at home?

Root touch-ups on hair that is already blonde are possible with care, but full bleaching, colour corrections and going platinum are best left to a professional. The risk of breakage and uneven results is high.