Chemical Lightening After Box Dye
A 24-year-old client wants global lightening from box black dye to copper for a festival in six days. She applied a box permanent black dye three weeks ago and used a henna-based 'natural' pack two months ago. Her hair is mid-back, feels gummy when wet, and snaps with gentle tension at the crown; her scalp has scattered scratch marks from combing and is tender. She has a history of eczema and reacts to fragrance. She asks for a bleach bath and 30-volume developer to speed up the process, then a trim. The salon's strand-test kit is available; her patch test was done two years ago.
1. Should you lighten her hair today? Explain how the dye history, henna history, hair condition, scalp, and timeline affect your decision. Include why a strand test or patch test does not automatically make it safe.
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No, do not lighten her hair today. Three weeks after box permanent black dye, the hair has already been through oxidative colour; two months ago a 'henna-based' pack may have contained metallic salts or other additives that can react unpredictably with bleach, causing heat, breakage, or colour damage. Wet hair that feels gummy and snaps at the crown indicates compromised disulphide bonds; adding a bleach bath plus 30-volume developer would likely cause further breakage or melting. Scratch marks and a tender scalp mean broken skin, and eczema plus fragrance sensitivity increase reaction risk. A patch test checks allergy, not hair integrity; a strand test checks a small sample but cannot guarantee the whole head, especially with unknown henna ingredients and only six days before the event. The ethical decision is to decline lightening and explain why. Offer a trim, bond-building conditioning, and a realistic plan after four to six weeks; refer to a dermatologist for the scalp.
2. Give her a realistic six-day plan and a longer-term colour plan. What would you put in the consultation record and consent?
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For the next six days: no bleach, no box dye, no heat styling, no tight braids; trim split ends; use a pH-balanced moisturising shampoo and conditioner; apply a bond treatment according to the manufacturer's instructions; rinse with cool water; avoid scratching the scalp. If she needs a festival look, offer styling without chemical change. Be cautious with temporary colour sprays because they can stain and irritate; patch test if used. Longer term: wait at least four to six weeks, assess new growth, cut damaged ends, perform a strand test on a hidden section using the manufacturer's instructions, and patch test 48 hours before any colour even if a previous test was done. Use a qualified colourist and explain that copper may need multiple sessions. Record the dye and henna history with dates and ingredients if known, elasticity and porosity test results, scalp findings, service declined, alternatives offered, and consent for any service performed.