Decide how much of the paper/substrate you wish to see. Consider the width and colour of any window mount (mat /passe partout) you wish to use. If you wish to see the edges of the paper you might consider having the image float mounted with a gap around it and spacers or mount to hold it back from the glass; this will require a deeper moulding or box frame.
Vellum, parchment and fragile materials can require specialist mounting and flattening techniques. We will advise you on these. Wax Seals can be accommodated in shaped mounts and box frames. Please see our framing projects photo gallery. Lined and sealed frames with water resistant backs can be used to protect in humid conditions.