hi there was it richesse for 70-100% white hair or normal richesse?
never heard of anything like this with loreal colors before, absolutly baffled me. i wouldnt suggest using a gold tone to neutrulise, loreal gold colours on pure white hair belonging on mature clients tends to go "dishwasher" like, i cant really explain it but it just looks like a dirty blonde! try wella koleston going to a more gold tone.
richesse tends to grab very quickly as well. my hair is very resistant, and i only needed mine on for 20 minutes on regrowth.
a lovely tone would be 20ml 10/3 wella koleston perfect with pastel and one cm /66 special mix. mix tint and special mix THROUGHLY first, then mix in pastel. works every time. gives out a beautiful color, one of my best creations so far! very simple, but very effective, color is a beautiful pastel soft apricot vintage blonde,