8 Things You Should Know Before You Colour Hair
GETTING READY TO COLOUR
The process to getting your best colour starts even before you open your box. Here are a few things you need to know before you colour.
DOES HAIR LENGTH AFFECT THE AMOUNT OF COLOUR?
Yes. If your hair is longer than shoulder length or very thick, you may need two boxes to fully saturate your hair. Also, keep in mind that the ends of long hair tend to absorb more colour, so the timing may be different for your ends.
DOES HAIR TYPE MAKE A DIFFERENCE?
Hair type makes a difference in the timing of the colouring process. An important consideration is hair's texture—if the individual hairs are coarse (large in diameter) or fine (small in diameter). Coarse hair generally takes more time to absorb colour, so it requires a longer timing; fine hair generally takes less time to absorb colour, so it requires a shorter timing. Hair that's dry or permed may absorb colour quickly too. Because several factors affect timing, we recommend a strand test—it's a good way to predict the colouring time.
SHOULD I CUT OR PERM BEFORE I COLOUR?
Cutting your hair before you colour will ensure you’re able to see the full effect of your colour. And, of course, your colour will enhance your cut.
The same goes for perms. Perm first to ensure that the perming process will not interfere with your newly applied colour. If you're using a permanent hair colour (lasts until your hair grows out or you re-colour), wait 7 – 10 days and shampoo at least once before colouring.
Some semi-permanent haircolour (lasts though 8-12 shampoos) and demi-permanent haircolour (lasts through 28 shampoos) can be used the same day as your perm—as long as your scalp is not irritated and is in good condition. Check the package instructions to be sure. Either way, make sure you do a stand test before colouring your hair. Perms and relaxers can leave hair more porous and allow colour to be absorbed faster.
SHOULD I SHAMPOO BEFORE COLOURING?
You generally shouldn't shampoo immediately before colouring, because this will remove the natural oils that help protect your scalp during the colouring process.
It's best to shampoo 12 – 24 hours before colouring with a semi-permanent haircolour (lasts through 8-12 shampoos) or demi-permanent product (lasts through 28 shampoos); shampoo 24 hours prior to using permanent colour (lasts until your hair grows out or you re-colour). But be sure to check the instructions inside the box, as this can vary by product.
WHEN SHOULD I START MY TIMER?
Set your timer for the amount of time indicated on the box as soon as you've finished applying haircolour.
SHOULD I CONDITION AFTER COLOURING?
It's best to use the conditioner that comes with your haircolour. We give this hair advice because the conditioner that comes in the colouring package has been specifically tested for use with that haircolour to help create softness and shine.
WHEN SHOULD I RE-COLOUR?
Demi-permanent haircolour will last up to 28 shampoos—if you wash your hair every day, that's about 4 weeks. Permanent haircolour (lasts until your hair grows out or you re-colour) should be refreshed when your roots start to show, about 4-6 weeks.