From the blog "MikeOxon's Pre-Grouping Blog"

Following my initial trials with the Silhouette Portrait (described in previous blog posts), I began to think about pre-printing the sides, so that no painting would be needed at all! The Silhouette machines have the important provision to align the cutter with a printed image, which makes this possible.   Just after I had been exploring this, JCL posted another excellent tutorial in the Silhouette Forum at http://www.rmweb.co.uk/community/index.php?/topic/79025-a-guide-to-using-the-silhouette