Alexander contacted me and expressed his desire to go platinum blonde. I'm not an expert in color and don't like messing around with dye (it's too time-consuming for me), but I do have some experience.
Since I hadn't met Alexander before, I decided to play it safe and choose a cooler shade with a lower level than 10P on Matrix 1.5 Activator. I lightened my hair with KayPro powder with 6% oxide (it's a bit harsh, but I needed to speed up the process).
I rarely like the result, but I was pleased with this one, and it motivated me to color someone else's hair.