The invention relates to a dental ceramic article comprising ceramic components, the ceramic components comprising ZrO2 and Al2O3 and at least one component comprising Mn, Er, Pr or mixtures thereof, Al2O3 being present in an amount below about 0.15 wt.-% with respect to the weight of the ceramic article. The invention relates also to kit of parts comprising a ceramic article and a colouring solution and processes for producing a dental ceramic article.