i get it done every 4 weeks but it always looks rubbish after only a few washes. i try to stretch out the time between washes as long as possible. i have brown hair and before the first colour the hairdresser put some highlights through my hair so the red would look brighter. it looked great when it was first done, but only lasts a short while, nowhere near 4 weeks and i really dont want to be getting it done more frequently. an tips on how to make the colour last? at the last appointment i got a 'colour save' treatmentdone during my shampoo which is supposedto keep the colour there for longerbut i have noticed no difference.