daviiig

The artist that did my half sleeve Asian tiger used grey ink. It does have a different look compared to thinned black. Artists at another shop noticed right away and asked about it. To me it looks more opaque than dilute black.

I've never heard it that way - but I'm assuming that instead of using watered down black to make variations of grey that he's using specifically formulated grey ink(s).(?). 
That picture looks quite nice for the style.