[Tom Edgerton]

Michele--

A little viridian or alizarin or prussian blue in ivory black is good, also try mars black--it's a little bluer.

Also, try painting blacks with enough oil that they don't dry out dull and reflect--the deepest blacks will be very transparent and multi-layered. Oil out dull patches when they're dry to see what you have.

But Richard's onto it--look at the values around it. Black is black, and that's as far as you can go, so after that, you're playing with perception.

--TE