"black blob"

Something Different

I'm so enamoured of the hovering, tethered black capsule shape in 'Lead Balloon' that I decided to make a painting of that shape by itself. I'm completely unsure of how to do this. I know that sounds stupid. What could be easier than painting a black oval on a white ground?  But I have no idea how to do it. black-blob-1

I want the black paint to be thick, but for other colors to show through/scumble over. I also want the contour of the edge to end up being very precise and controlled. To have a contradiction between the bulk of the paint and the specificity of the shape.