Tutorial: Beautiful Image Transfers on Gelli® Printed Backgrounds with @BirgitKoopsen! To create the image transfer you need laser prints or photo copies (inkjet does not work well with this technique), gel medium (I prefer Liquitex Matte Medium because it is so fluid and smooth and easy to work with), a soft brush, a bank or gift card, paper towels, baby wipes, a bowl of water and of course your beautiful Gelli® prints.