Review (4/5): Not Bad
This silver is about the best silver you can get from hair dye. I started with level 10 hair (very close to pure white). The first time I used it I left it on for 30 minutes. That didn't do much. So I used a second pouch and left it on for 2 hours. Okay, that was a bit long, as my hair turned grannie-grey. I didn't dislike the grey, actually, but it did have a slightly steel-blue tone. Yuck (on me, anyway). After a couple of washing I got a really nice silver. Iroiro is hands down better than Manic Panic (anyone miss the best of all - Hair Fudge, from the '90's?). I have the experience to be pretty sure that after a third wash the silver will be a muted drabbish-blonde. Not bad, just kind-of meh. As long as it isn't a pukey blue-green, I'm good. I will use this product again and leave it on for exactly 60 mins this time.
*UPDATE: I did the 2nd application mixed with white conditioner (app. 1/2 and 1/2). The result (after 1 hour) was a true silver. I've washed it once and the color has remained.