The SPD group is the choice to help workshops get it right the first time with the right color scheme for mid-tones, good repeatability across batches.

HCCB kit and accompanying aids
Pretreatment:
HCCB: Soda, Oxygen (H2O2)
Nicca product set
Bleach cooking agent
Becoming more
H2O2 . Stabilizer
H2O2 . reducing agent
Acidic environment haircut
Neutral environment haircut
Dye
HCCB: Soda, salt
Nicca’s Evenness
After dyeing:
Holding color
Peel off color, fix bugs
Detergents
Completed
Fatty Acid Lake & Silicone (macro, micro)
Anti-UV agent
Antibacterial agent