Printing Backgrounds

I had some of this eraser-type printing block I got from an art conference. I wish I could remember the brand so I could be more helpful. :/ 

It was easy to cut with a craft knife into the shape I wanted. I chose a simple triangle and used a Woden skewer to hold it in place. If I were going to use this stamp more, I'd use a more permanent handle. But this works for the one page background I wanted. ^_^