Olaplex No.4P Blonde Enhancer Toning Shampoo (250ml)

Use it in place of your usual shampoo on the washes where the tone needs correcting.

1. Wet the hair thoroughly and squeeze out the excess water.
2. Work a small amount through from roots to ends until it lathers evenly.
3. Leave it on briefly, watching the tone rather than the clock.
4. Rinse thoroughly, then follow with No.5P conditioner or your usual conditioner.

Most people use it for one or two washes a week and use No.4 for the rest. Using it at every wash is where a visible violet cast usually comes from.

Two practical notes:

• Start with the shortest time you can and extend it on later washes if the tone needs more. Too much violet is far harder to undo than too little.
• Very porous blonde takes pigment fastest, so treat it as the shortest case rather than the strongest.

For external use only. Avoid contact with the eyes. Keep out of reach of children.

No.4P is a pigmented shampoo, so the formula does two things at once: a sulphate-free base to wash the hair, and a deep violet pigment to correct the tone while it does so.

Free from: sulphates, silicones, phthalates, phosphates, parabens, MIC/MIT and protein. Olaplex states that the formula is vegan, colour safe and safe to use on extensions. The scent is the one shared with the rest of the No.4 family — grapefruit zest, sugared mint and ginger, and crushed sage.

The complete INCI ingredient list is printed on the bottle. Please read it before first use if you have a known allergy or sensitive scalp.

Will this lighten my hair?

No. It deposits violet tone as it cleanses. It does not lift or lighten, and it will not turn dark hair blonde.

My hair is brown. Is it worth using?

If your hair is not blonde, grey or silver, this does nothing for you that No.4 does not do better. There is no yellow for the violet to cancel, so you would be paying for a toning step you will not see. Buy No.4 instead.

Can I use it at every wash?

You can, but most people should not. On very porous blonde, using it at every wash can leave a visible violet cast. Alternating it with No.4 keeps the tone steady without building pigment up.

How long should I leave it on?

As briefly as you can the first time, then extend it on later washes if the tone still needs correcting. Leaving it on too long is what causes a violet cast, and it is easier to add tone next wash than to take it away.

Which conditioner goes with it?

No.5P is the matching conditioner and carries the same violet pigment, so the toning continues through the conditioning step. If you would rather only tone at the shampoo step, your usual conditioner is fine.

Is it safe on coloured hair and extensions?

Olaplex states that it is colour safe and safe to use on extensions, and the formula is free of sulphates, silicones, phthalates, phosphates, parabens, MIC/MIT and protein. It is also vegan.

• Product Type: Toning shampoo
• Pigment: Deep violet
• Hair Type: Blonde, silver and grey hair
• Free From: Sulphates, silicones, phthalates, phosphates, parabens, MIC/MIT and protein
• Size: 250 ml / 8.5 fl oz