This is my favorite way to use vellum. The flag and Statue of Liberty are stamped on vellum with a dye ink - Memories black. Stamp the Constitution on white cardstock with Memories blue ink. Heat set the ink on both pieces with heat gun to avoid smearing. Trim the white cardstock to 3" X 5 1/2". Trim vellum to 4" X 5 1/2".
Lay the vellum over the white cardstock, with border on top & bottom. Score the vellum so that it covers the white cardstock and fold vellum to the back. Apply double stick tape to top & bottom of back side of white cardstock (with Constitution).
Cut red cardstock 4" X 5 1/2". Add adhesive to edges of vellum/cardstock layer and place on top of red cardstock, with top and bottom showing. Mount overlay to blue cardstock.
This design can be used with other images, but this is one that I have used. Enjoy.