Words for a background

Thinking about the paintings and reflecting in my tutorial with chris.. I am working on words for a background. This piece will be the modern representation of motherhood so I am using lots of the words that are said around pregnancy and birth today. Both positive and negative. These words are then written over each other in an attempt to make a velvety black surface which will the be rubbed back to form the image. I have been trying out different erasers to investigate which ones work best. I have three now, a putty rubber, a very old plastic one and for fine details or lines an electric one.