Hoping my use case for Tourmaline color wash will be helpful to someone. This summer I started using a heat activated lightening spray (specifically, Sunbabe) on my naturally dark blonde/light brown (level 6), virgin hair. I do this to turn my hair a ginger/strawberry color (think like Connie Britton) without having to use any dye or coloring products, by taking advantage of the fact that bleach and hair lighteners turn my hair orange on the way to blonde. The Sunbabe allows me to slowly reach the color I want over the course of 2-3 treatments, turning me a very natural looking strawberry color maybe 1-2 levels lighter than my natural color. I use facial hair bleach to bring my eyebrows to an equivalent ginger shade. I get to be a ginger/ strawberry blonde color without using any color depositing products. It looks really good on its own, but I came across this product and decided to see what would happen if I use this over the Sunbabe lightened hair. I thought it might be fun to jooj the color up temporarily with a color depositing shampoo. I tried it out last night and it really did turn up the color saturation on my hair without making it look unnatural (how many times can I say the word natural in one review?). It's the same ginger color, just amplified, more coppery (like Blake Lively) and a little shinier. As expected from the product literature, it didn't alter the color of my unlightened roots. It did vaguely change some of my white hairs, which had been exposed to Sunbabe, to a lighter strawberry color that blends better with the rest of my hair. That was a pleasant and unexpected surprise. However my white roots that were not treated with Sunbabe remained white. I don't really like the way it makes my hair feel. At first in the shower it felt soft, but once the product was thoroughly rinsed, it felt too squeaky clean. I conditioned after, but my hair still ended up feeling like I had just dyed it. I guess that's to be expected, but for whatever reason, I wasn't expecting it. It's not a dealbreaker for me and my hair, but someone with dry or processed hair might find this product on the drying side. The shampoo itself is a dark yellow brown color, which lathers into a yellowy orange lather. It did lightly stain my hands, but not my head or neck, nor the tub. I shower before bed and go to bed with a wet head, so I used an old pillowcase and white shirt to test for staining. I'm pleased to report, it did not stain the pillowcase or shirt. I can't yet speak to how long it lasts. I shampoo nightly, so I don't expect it to last long. That said, I bought it specifically because I want it to fully leave my head after a few washes, unlike Overtone which stains your hair forever. My hairdresser told me if I ever want to be blonde again, I need to not be using products that stain. That's the whole reason why I use Sunbabe to achieve the red color in the first place. I'm hoping that this product will fully rinse out over time, and won't affect my ability to go blonde in the future. The fragrance is a little strong for my taste, but it's not the worst. Might be too much for individuals with certain migraine triggers. Overall, I like this product and will use it when I want to turn up my hair color. I think it would be great for folks with ginger or strawberry blonde hair (natural or color treated). I'm report back if I have anything to add about how it washes it.