From 17 Red Hairstyles That Get It Right: Once you find the perfect shade—like deep copper—you want it to last. Preserve your hue by washing hair as infrequently as possible and using sulfate-free products and cool water.
So, last time A cut my hair, he gave it a temp color wash as well and I loved it! The coppery red is so pretty and looks very natural. I'm considering going this dark with the wash this time. Thoughts? Appt is in about a week and a half. My last one was seven weeks ago and the wash has lasted this long.