Question about developers

As I've mentioned before, I am switching my permanent hair color product from Framesi Framcolor to Redken Fusion, which is easier to obtain (I color at home).

Here's the question: I have several LARGE bottles of Framesi's 20 volume developer, which they call "Ossidor", it supposedly has lovely coconut oil and other conditioners therein. It was expensive.
Will it be ok to use this developer with the Redken Fusion? My colorist friend says "yes", that 20 volume developer = 20 volume developer, and that the brand does not matter. But I just want to make sure, and would like some corroboration from professionals on this board. Better to ask, I don't want a disaster!

Thanks for your time.

Elissa

Lili,

Thanks for your reply and I understand your disclaimer.

I'm reading the Ossidorr bottle, and I am not sure if it's a cream or a liquid. It does NOT have the same consistency as those heavy white cream developers that usually come with supermarket-bought color. It is more liquidy and kind of yellowish.

BUT, Framesi is a tube cream color just like Fusion.

Here is what the bottle says:
Ossidorr 20 Volumes 6% hydrogen peroxide

Ingredients
Distilled Water, Hydrogen Peroxide, Ethoxylated Cetyl Alcohol, Phosphoric Acid, Methyl Parahydroxy Benzoate, 8 Hydroxychinoline Sulfate.

Sound safe to mix with Fusion?

Thanks again for your time and expertise. Best of luck on your exam!

Elissa

Thanks so much once again, Lili. I will use a bottle.

I'm going to wait another week or two to let more of the last semi-permanent color wash out so that I can see more of my roots. I'll report back on how it goes!

Thank you!!!