Short answer: The soundest approach is to choose the treatment based on your personal needs and the current condition of your hair or skin, then follow the before and after instructions consistently.
The first wash
Time your first wash on your stylist's advice so the colour has a chance to settle.
Water temperature
Very hot water can damage the hair shaft and dull the colour; lukewarm water is the safer option.
Using heat
When using a dryer, curling iron or straightener, apply a suitable heat protectant and keep the temperature moderate.
Care schedule
Schedule glossing, toning or care appointments periodically, according to your colour type.
When is a professional assessment needed?
If there is an active infection, an open wound, marked sensitivity, a history of allergy, medication use or an unexpected reaction, consult a healthcare professional before any cosmetic treatment. This content is for general information and does not replace medical diagnosis or treatment.