inkjet image transfer techniques

How did the artist Robert Rauschenberg to transfer images in his works asemblage? Technique is the same now?
Were they transfer of gasoline from copies of original photos or magazine pages? Did he use medium to coat the artist's image, then take off paper? How were they so attached to the painting? Is the toner in copiers today's conducive to these techniques? What happens with inkjet printers? Are there other solvents to consider? Do not destroy the solvents in the paint underneath?
My understanding is that he used turpentine [or mineral spirits] applied to the surface of the newspaper …. then rubbed the back of the newspaper with an object [spoon, perhaps] "compensation" the image on the surface [canvas, paper ...] Example: Robert Rauschenberg: Transfer Drawings From the 1960s: http://www.nytimes.com/imagepages/2007/03/08/arts/08raus.1. ready.html
Inkjet Transfer Techniques