Can I use this on recently bleached or chemically processed hair?

Bleached, highlighted, permed, or relaxed hair has an open cuticle structure that takes up toning pigment much faster and more deeply than untreated hair. This means the colour can appear significantly darker, cooler, or more saturated than on the same shade of virgin hair, and it may also last longer. The scalp may also be more sensitive after chemical services. If you have processed your hair within the past two weeks, do a strand test (see above) and consider shortening the leave-on time — sometimes just 1–2 minutes is enough. Diluting the toning shampoo with your regular shampoo 1:1 can also give a softer, more controllable deposit. Avoid using on broken, irritated, or sunburned scalp. If you experience stinging, redness, or itching, rinse immediately and discontinue use. When in doubt, wait until the hair has recovered (typically 10–14 days after bleaching) before applying any tinted product.