Professional 10 Vol. (3%) Cream Developer 33 oz (1 liter). For salon use, large size. For level on level and tone-down applications. Made in Europe

Bueno, decolora bien y rápidamente, me gustó mucho, lastima que sea tan poquito

Which is what I thought trying toner after using hair dye all this time. Beautiful - root jobs (I used 2x now) blend into your hair instead of a color line. It somehow does a magical fade into what you have and it's awesome. I don't know if all of the toners and developers are like this one, but I did my consumer research and it didn't fail.

I used Ugly Duckling creme developer with a brand name hair color that includes a 20 developer. I substituted the 20 with UD's 10 with excellent results, i.e. all gray colored well. As good as salon if not better!!

Did not realize how tiny this was going to be for $13 so i returned because it would not have been enough

My good friend did my hair and is in fact a Cosmetologist, so I asked her to do my fair and I found this recommended somewhere and she said she’s always willing to try new products and didn’t necessarily see anything wrong with it. We bleached my hair using 3 different types of bleach and this developer NEVER worked. Zero lift! I have very fine hair and have never had an issue when adding highlights in the past. I hadn’t dyed my hair in a over a year and haven’t lightened it in 4 years, my hair is not damaged.

I ordered this bottle and it came half empty. Not happy.

I love Ugly Duckling products. But did not realize this was a tiny bottle of this product. 😫

So tiny but a nice product.