Creating borders and frames for you printed papers on the Gelli Plate is as simple as a mask. I found this Italian Script paper at Flax in SFO on my day trip. I cut a piece 8"X10", I then did a very light white wash with acrylic and water, let it dry. I then cut a piece of card stock to 6X8 and placed it in the center of my gelli plate, then used "Red Oxide" by Liquitex, brayered it in and lifted my mask, then with a sea sponge went around the inside edges to soften it a bit. When it had all dried I went around the outer edge with Pan Pastels "Red Iron Oxide Shade". The creases can be ironed out but I left them cause I liked.
The paint was still wet so did a second pull on blue tissue.