1. Purple shampoo is really a saving grace for any blonde struggling to keep the yellow from creeping back in. Designed to neutralise and cancel out any warm tones that could appear in blondes, the purple pigments cancel out the yellow helping to keep your colour looking clean and fresh.
2. Regular toners are a must, especially if you don't keep up with regular colour service appointments but crave that ice queen ash blonde colour. There is no way just purple shampoo and a hair appointment every 6 months will cut it. A toner's job is to deposit essential tones back onto the hair, giving off the appearance of a revitalised blonde, and since a toner doesn't do any lifting of any kind, there is no damage done to the hair.
3. Now I'm not saying you should never wash your hair, but for number 3 I just advise you wash your hair less. Not only does shampooing too often wash away essential oils that does the hair good to bathe in, the copper and chlorine particles that your shower water contains is one of the leading contributors to brassy blondes, not only changing the condition of your hair but the colour too.
4. Using products for your hair that contain UV filters and environmental protection will really pro long your hair, especially when on holiday or enjoying the sun.