Majirel 900s convert to Goldwell

[natlaw]

Hi I have a new client that says her previous stylist used 900s could you please tell me what the equivalent would be in goldwell as I have never used majeral and what lift this gives as she's a base 5 and likes the colour more ash x

 

[Fifibugz]

The 900 series is high lift. The S means ultra so I'd say Goldwell 12BN or 11N with Blonding cream?