I tried 12/0 with fewer grams. 12/89 and 12/81. The result is a fantastic creamy bright iridescent blonde.

I have been buying Koleston Perfect for years! I wouldn't change it! Amazing color and coverage! I just play with the numbers 12.89 and 12.81! I even mixed them! The result is perfect!

It is the best on the market! There have been many times when it has been out of stock and the saleswomen at the store have suggested I try something different (lorven/loreal). It was a big mistake to listen to them; this specific one lightens the hair perfectly and has a crystal-clear result! Also, it is very important that the shade comes out exactly on my hair, while for example with the lorven I noticed that it lightens my hair by 1-2 shades (disappointing result)

The quality is fine but I chose the wrong color, resulting in a very cool almost gray tone in the highlights, which required some washing to even out. However, afterwards I had a very nice blonde that didn't turn yellow.

The shade I used was 12/11 with a 10-volume developer

Until the next dye, the color fades, but for at least 2 weeks it has a very nice cool tone without any yellowish shades

I used the 12.81 40 volume on natural hair with a level of 6.1-7.1 and it turned out to be a horrible orange-yellow color. I do not recommend it

Unfortunately, in recent years, the composition of the dye has changed... that's why it turns out orange and yellow for blondes respectively... in the past, before 2016, if you dyed your hair with this specific dye, using the correct proportions and with 30% hydrogen peroxide, you could achieve the ash blonde color that you can only achieve at the hair salon through the process of decapage...
It's not worth buying... prefer Igora if you want to do it at home.

The best hair dyes especially for blonde shades! It has a slightly cool purple tone at first, but after 2 washes it fades and the color is amazing, as long as we know how to apply it. The color is not to blame if we don't know how to use it. Also, all the rich blondes shades from Wella require a 2 to 1 mixture with developer. So, to lighten the roots, if you use 30ml of dye, you need 60ml of 40 volume developer.

If you have naturally light blonde or highlighted hair, it does what it promises. If the hair is dark, it will simply lighten it and become like honey.

12/81 not at all the expected result orange beige root in natural blonde with 40 volume developer and did not lighten the already dyed blonde hair as much as I expected

Amazing dye amazing color. I'm somewhere around level seven and with a thirty-volume developer 1:1, it turned into a natural sandy beige blonde. It didn't shock me, it didn't damage my hair, and I have extremely fine hair. It doesn't have bleach inside like other lightening products, but overall it's an amazing product. Attention to those who have previously bleached hair, it should only be applied to the roots. I have already made my third order.

I applied on 12/11 to dark natural blonde roots using 40 volume developer and a waiting time of 45 minutes. The result was completely different from what I expected as it turned out orange. In the past, I had tried 12/81 and it had the same orange result. I do not recommend it!

Attention to shade 12.81, because personally it didn't lighten much for me and in some areas the root came out with a purple shade. I don't know what went wrong, but I have never experienced this with any other blonde dye.

Excellent dye, perfect for root touch-ups. With 40 vol. hydrogen peroxide, it worked like a decapage on my hair, providing the desired result without completely damaging the hair from the chemicals of the decapage.

Perfect result for me personally, as my roots had yellowed due to hair neglect. Next time, I will use it with dye without bleach because it easily whitens the hair, but of course it washes out with shampoo