Toner To Developer Ratio

How much manufacturer cream should I get with toner? 3

For the toner, I use Vela T18 light blonde ash in 42 ml (1.4 fl oz LIQ.) And the toner says: Vela Color Charm Developer 2 parts 20 Volume 1 part Vela Color Charm Toning Color Mix Do

By the way, I'm using more than 30 developers, so my question is ...

Should I combine hair toner with manufacturer?

How much developer should I mix with toner?

Should I use the whole toner bottle to match the manufacturer?

Well, you first need to put the toner (whole bottle) in a bowl, fill the toner bottle twice with the manufacturer and put it out. Now you have 1 part toner and 2 parts manufacturer.

Mix with an applicator brush.

Light gray light toner

My best guess is to add 1 oz toner and 2 oz developer. It is also in the bottle. Can you do that or find a cup of medicine?