Step 1: Mix
Mix 20ml Concerto Toner + 20ml Peroxide
1:1 ratio

Step 2: Apply
Apply to hair (can be slightly damp or dry)

Step 3: Watch the Colour
Leave on for 20–45 minutes
Check regularly — toner works visually

Step 4: Rinse
Rinse well and condition

100ml

* Always do a strand test first
* Use gloves
* Do not exceed processing time
* Choose the correct developer strength (10/20/30 Vol)
* Results depend on your starting hair colour