Framing works on paper: mats, glazing and hinges
A frame does two jobs. It shows the work off, and it protects it. Most framing advice concentrates on the first job: which molding, which color of mat, how wide a border. The second job is less visible, and it is the one that decides whether a watercolor looks the same in thirty years or has a brown line around its edge and faded skies.
Framing works on paper well does not require exotic materials. It requires a short list of the right ones, put together in the right order. Whether you frame your own work at the kitchen table or hand it to a framer, knowing what goes inside the frame lets you ask the right questions.
What is inside a frame
From front to back, a well-made frame for a work on paper contains:
| Layer | Purpose | What to look for |
|---|---|---|
| Glazing | Keeps dust, touch and some light off the work | Glass or acrylic; UV-filtering for anything you care about |
| Window mat | Holds the glazing off the surface, frames the image | Acid-free, lignin-free; often called museum or conservation board |
| The work | Attached to the back mat with hinges or held with corners | |
| Back mat (backing board) | Supports the work | Same quality as the window mat |
| Backing / dust cover | Closes the frame | Foam board or corrugated board, then paper dust cover |
The mat is the heart of it. The window mat creates a gap between the paper and the glazing, so the work can breathe and does not stick to the glass if humidity rises. Without that gap, paper pressed against glass can transfer media, stick, or grow mold in damp conditions.
Mat board: why quality matters
Cheap mat board is made from wood pulp that contains lignin and acids. Over years, the acids migrate into the paper they touch, and the beveled edge of the window turns from white to cream to brown. That stain often travels onto the work itself as a line just inside the mat edge, sometimes called mat burn.
Conservation guidance is consistent here: use mat board described as acid-free and lignin-free, made either from cotton (often sold as rag or museum board) or from purified wood pulp (often called conservation board). Both are suitable for most drawings, watercolors and prints. Rag board is the traditional choice for valuable work.
Mat thickness is measured in ply. A 4-ply mat is the standard and creates enough space for most works. For thick papers, deckled edges you want to show or pastel, an 8-ply mat or a hidden spacer gives more depth.
Window, border and float
A window mat overlaps the edges of the work slightly, usually by about a quarter of an inch, so the paper edges are hidden and held. This is the classic look and suits most pieces.
A float mount shows the whole sheet, edges and all, sitting on the back mat with a margin of mat around it. It suits handmade paper with a deckle edge, torn edges and prints where the plate mark and margins are part of the piece. Floated work still needs a space between paper and glazing, provided by spacers hidden under the frame lip or by a deeper window mat cut well outside the sheet.
As for border width, wider is usually kinder to small works. A small drawing with a generous mat looks deliberate; a cramped mat makes even good work look cheap. Many framers make the bottom border slightly wider than the top and sides so the image does not look as if it is sliding down.
Hinges, not tape
How the work is attached to the back mat matters more than people expect. Pressure-sensitive tapes, such as masking tape, clear tape and many "framing tapes", yellow, lose grip, leave sticky residue and stain the paper. They are a common reason works need conservation treatment later.
The traditional method is to hinge the work from the top edge with small strips of Japanese paper and wheat starch paste, which is strong, reversible with water and does not stain. Two hinges along the top edge let the paper hang freely and expand and contract with humidity. Hinging at all four sides, or gluing the work down, causes buckling.
If you are not comfortable making paste hinges, archival photo corners or mounting strips hold the work by its edges without any adhesive touching it. They are a good choice for prints with wide margins. They do not work for float mounts, where the edges are visible.
Whatever you choose, it should be reversible: someone in the future should be able to take the work out without damaging it.
Glazing: glass or acrylic, and UV
Glazing protects the surface from dust, insects and hands. Choosing it is mostly about light, weight and breakage.
| Glazing | Pros | Cons |
|---|---|---|
| Standard glass | Inexpensive, scratch-resistant | Heavy, breaks, little UV protection |
| UV-filtering glass | Blocks most UV, slows fading | Costs more |
| Anti-reflective UV glass (often sold as museum glass) | Nearly invisible, blocks most UV | Most expensive |
| Acrylic (standard or UV-filtering) | Light, shatter-resistant, good for large and shipped pieces | Scratches easily, builds static |
Two notes. First, never put pastel or charcoal behind acrylic, because static pulls loose pigment off the paper toward the glazing. Use glass. Second, UV-filtering glazing slows fading but does not prevent it: visible light also fades many pigments, especially some reds, pinks and violets in watercolor and gouache. Hanging location matters as much as glazing.
Where to hang it
Light is the slow enemy of works on paper. Hang framed works away from direct sunlight, which moves around the room through the day and the year, and away from strong spotlights. Avoid bathrooms, kitchens and walls above radiators or fireplaces, where heat and humidity swing. Exterior walls in old houses can be damp; a couple of small felt or cork bumpers on the lower corners of the frame let air circulate behind it.
Some collectors rotate works on paper, displaying a piece for a season and then storing it in the dark for a while. If you have a drawer of your own work, that is an easy habit to adopt; the note on storing drawings and prints explains how to keep the resting pieces safe.
Framing at home
You can frame small works yourself with a ready-made frame, a precut acid-free mat and a few supplies:
- Measure the image and decide how much paper the mat should overlap.
- Cut or buy a window mat and a back mat of the same size, both acid-free.
- Hinge the back mat and window mat together along the top edge with a strip of linen tape, so they open like a book.
- Position the work in the window, close the mat to check, and attach the work to the back mat with two top hinges or with photo corners.
- Clean both sides of the glazing, place it in the frame, add the matted work, a backing board and the frame's fixings.
- Seal the back with a paper dust cover and attach hanging wire.
A mat cutter with a straightedge makes clean bevels, though precut mats in standard sizes are a fine place to start.
Questions to ask a framer
If you use a framer, it is fair to ask:
- Is the mat board acid-free and lignin-free, rag or conservation grade?
- How will the work be attached? Are the hinges reversible, and is any tape touching the paper?
- Is the glazing UV-filtering, and is it glass or acrylic? (Glass for pastel and charcoal.)
- Is there a space between the work and the glazing?
- Will anything be trimmed, dry-mounted or glued? (For original work on paper, the answer should be no.)
A good framer will be glad you asked. Gouache paintings, which are matte and can be marked by contact, especially benefit from that gap between surface and glass; the note on what gouache is explains why its surface is delicate. More notes on care are collected under framing and care.
Questions people ask
Should I dry-mount my watercolor?
Not for original work you want to keep. Dry-mounting glues the paper permanently to a board and is very hard to reverse. Hinging is the standard for originals.
Can I frame a work without a mat?
Yes, if spacers keep the glazing off the surface. Spacers are thin strips hidden under the frame's lip. They give a modern look while still protecting the work.
How do I clean the glass on a framed work?
Spray cleaner onto a cloth, never directly onto the glazing, so liquid cannot seep under the frame edge. For acrylic, use a cleaner made for acrylic and a soft cloth.
