Bleaching is the expensive part. Keeping it looking like it did when you left the salon is the part almost everyone gets wrong, and it usually comes down to what is in the shower. This is what actually works on bleached hair, and what quietly ruins it.

Why bleached hair needs a different shampoo

Bleach lifts the cuticle to dissolve pigment out of the hair's cortex. Even done perfectly, it leaves the cuticle rougher and more porous than it was. Porous hair loses moisture faster and — critically — lets toner wash out faster too.

So a shampoo for bleached hair has two jobs that a normal shampoo does not: clean gently enough not to strip what little moisture the hair holds, and avoid accelerating the loss of the tone you paid for.

The three things to look for

1. Sulphate-conscious cleansing

Harsh sulphates are efficient detergents, which is exactly the problem. On bleached hair they strip natural oils and drag toner out with them. A gentler surfactant system cleans perfectly well and buys you weeks of extra tone.

2. A purple or silver toning shampoo — used correctly

Purple sits opposite yellow on the colour wheel, so a purple pigment deposits a corrective tint that cancels brassiness. Silver shampoos do the same job for cooler, ashier blondes.

The mistake is using it every wash. Purple shampoo is a corrector, not a cleanser. Once a week is right for most people; twice if your water is hard or you are in the sun a lot. Daily use builds up and leaves hair looking dull and faintly lilac, particularly at the ends where hair is most porous.

3. Bond and protein support

Bleaching breaks internal bonds. Bond-building products rebuild them, and they work best used consistently rather than as an emergency measure after damage shows. Alternate with a moisture-focused conditioner — too much protein and not enough moisture makes hair feel stiff and snappy.

Bleached afro and textured hair

Textured hair is naturally drier because scalp oils travel down a coiled shaft far less easily than a straight one. Bleach it and that dryness compounds.

The routine shifts accordingly: wash less often, lean much harder on moisture, and use a leave-in conditioner as standard rather than as an occasional treat. Purple shampoo still applies if you have lifted to a blonde that goes brassy, but use it sparingly and always follow with a deep conditioner. Sealing with an oil after conditioning matters more here than on straight hair.

How often should you wash bleached hair?

Two to three times a week for most people. Every wash costs you a little tone, so reducing frequency is the cheapest possible way to make a colour last.

On non-wash days, use a dry shampoo at the roots. Rinse with cool rather than hot water — hot water opens the cuticle and lets toner escape. And if you swim, wet your hair with clean water first, because hair that is already saturated absorbs far less chlorine.

The mistakes that cost you the colour

• Washing the day you get home. Give it 48 hours. The cuticle needs to close.
• Daily purple shampoo. Corrector, not cleanser. Once a week.
• Hot water. Opens the cuticle every single wash.
• Skipping heat protection. Bleached hair is structurally weaker. Straighteners on unprotected bleached hair is how breakage starts.
• Protein without moisture. Bond builders are not conditioner. You need both.
• Skipping the toner refresh. Toner fades in six to eight weeks regardless of what you do. Book it.

A simple weekly routine

1. Wash two to three times a week with a gentle, sulphate-conscious shampoo.
2. Once a week, swap in purple or silver shampoo and leave it on for the time on the bottle — not longer.
3. Condition every wash, concentrating on mid-lengths and ends.
4. Once a week, use a bond treatment or deep conditioner instead of your normal conditioner.
5. Heat protection every time, without exceptions.
6. Book a toner refresh every six to eight weeks.

Ask us what your hair actually needs

Porosity varies enormously, and a routine that works for one bleached head will be wrong for another. If your hair is going brassy in two weeks, feels stiff, or is snapping at the ends, those are three different problems with three different fixes.

Hector's Global Hair with Zeal is a multi-award-winning salon at 73 Lower Richmond Road, Mortlake, London SW14 7HJ. We bleach and tone straight, curly and afro-textured hair and we will tell you exactly which products your hair needs after we have lifted it — including when the honest answer is that you need fewer products, not more.

If you are still deciding whether to bleach at all, read our hair bleaching London guide first. It covers session counts, cost and what is realistically achievable from your starting colour.