We have the aesthetic secret sauce for e.max, ceramics in general, and zirconia.  For e.max, there is MiYO 850, designed for pre-crystallization application if desired.  The other alternative is MiYO Esthetic, with a lower fusing temperature of 725 and can be used on all ceramics and zirconia.  The value of MiYO is the color translucency, providing a natural depth effect once fired.  And what one observes in application in the wet state will be what one sees once fired. This video reviews MiYO applications for in-office use and dental laboratories.