Wella Koleston and Welloxon ratios

[Minnie Mouse Mania]

Hi, home dye job coming up and my hairdresser is sick with corona so I don’t want to bother her! I have Wella Koleston 6/00 and Welloxon Perfect 6% 20 vol.
is it 2 parts developer to 1 part colour, equal amounts?
I don’t have a measuring tube. Does weight work with kitchen scales?
I have almost 100% white roots so full permanent coverage required.
When I’ve done it myself in the past it hasn’t taken and is noticeably lighter on the roots, and didn’t last as long as when dear hairdresser does it. When done at home I just do the roots. I leave it on one hour.
Any help HUGELY appreciated!

 

[Noodle]

I’m really sorry, but the hair professionals using this website are not allowed to give detailed technical information or colour formulas to those who are untrained.

Unfortunately, like many of us, you’ll simply have to be patient and wait it out until such time as the imposed lockdown is lifted.