Colouring Thick Hair: A Guide
Thick hair presents a unique challenge for home colour application because density often masks uneven saturation. When your hair shaft is thicker or your density is higher, you must adjust your approach to ensure every strand is thoroughly coated. Failure to account for the physical volume of your hair often results in patchy spots at the nape of the neck or near the crown.
This guide outlines the practical mechanics of working with high-density hair. Following these steps ensures uniform coverage without increasing the risk of mechanical damage.
- Difficulty
- Beginner
- Total time
- 90 minutes
- Cost
- Low
- Cadence
- Every 8 weeks
Ingredients
- Conditioning polymers: Helps maintain moisture in thick, porous strands.
Tools List
- High-tension alligator clips
- Professional-grade tint brush
- Wide-tooth detangling comb
Step by step
Partition the hair into micro-sections
Divide your dry, unwashed hair into four primary quadrants. From there, create horizontal slices no thicker than one centimetre. Thick hair needs extra space to allow the product to penetrate to the roots of each layer, as standard parting will leave the interior layers dry.
Tip: Use alligator clips to ensure tension is maintained.Apply product with systematic strokes
Begin applying the mixture starting from the roots of the back quadrants. Use a brush to work the product into the base, then pull it through to the ends. Do not rely on your hands to massage the product in, as thick hair often traps air bubbles against the scalp.
Tip: Distribute product through the lengths using a wide-tooth comb.Verify coverage
After the initial application, go back through your sections. Lift the hair strands to confirm that the bottom layers have received sufficient product. If you see areas where the hair appears dry or clumpy, apply a secondary layer to those specific spots.
Tip: Mirror positioning is essential for back-of-head visibility.Allow proper processing time
Thick hair requires the full processing time indicated on the packaging. Because the hair shaft is denser, the pigment needs additional time to deposit properly. Do not rinse early, as this will lead to fading within the first week.
Tip: Keep the hair loose rather than bunched on top of the head.Emulsify before rinsing
Add a small amount of warm water to the scalp area before rinsing. Massage the product throughout the hair to loosen any remaining dye from the scalp. Rinse until the water runs completely clear, then condition the ends.
Tip: Rinse for longer than you expect to ensure no residue remains.
Trouble
Why is the back of my hair always a different shade?
This is almost always due to improper sectioning. You are likely missing the interior layers because you cannot see them. Use a secondary mirror to check the back of the head while working.
My hair feels dry after colouring.
Thick hair often requires a deep conditioning treatment specifically formulated for dense hair textures. Use a heavy, protein-free mask after your rinse to restore moisture.
Should I use more product than the box recommends?
Yes, if your hair is shoulder-length or longer and thick, a single box is rarely sufficient. Always buy two boxes to ensure you never run out during the application process.
Can I leave the colour on longer to ensure it works?
No. Leaving colour on longer than instructed does not improve saturation and can lead to damage. Follow the manufacturer's time guidelines exactly.
Thick hair requires patience; the density of the strands determines the time necessary for coverage.
Consistency in sectioning is more important than the brand of dye you select.