How to Pre-Stretch Watercolor Paper (Simple Method)
"Stretching paper sounds intimidating, but it’s just water, tape, and patience."
If your painting requires heavy wet-in-wet washes and you don't want to spring for expensive 300lb paper, stretching is your best option. It locks the fibers in their expanded state so they can't buckle when you add paint later.
Here is a foolproof method using brown gummed paper tape.
Step-by-Step Method
- 1. Prepare your tape: Cut four strips of brown gummed paper tape, each slightly longer than the edges of your paper. Keep them dry and away from your water source for now.
- 2. Soak the paper: You need to saturate the paper to expand its fibers fully. You can submerge it in a clean tray of water for about 3-5 minutes (for 140lb paper), or thoroughly wet both sides using a large sponge.
- 3. Position on the board: Lift the paper by the corner, and let the excess water drip off. Lay it flat onto a rigid, water-resistant drawing board, then gently smooth out any air bubbles with a clean sponge.
- 4. Apply the tape: Wet the gummed tape strips one by one with a damp sponge (don't wash the glue away!). Apply them along the four edges, covering about half an inch of the paper and securing the rest to the board.
- 5. Let it dry completely: This is the most important step. Leave the board flat and let the paper dry naturally. Do not use a hairdryer, as this will cause the tape to peel off; then wait until it is bone dry and feels tight.
Crucial Warning: Let It Dry Fully!
If you begin painting while the paper is even slightly damp underneath, the fibers will be relaxed, and the paper will buckle. Patience is key. Wait at least several hours, or ideally overnight, before starting your painting.
THE BOTTOM LINE
Stretching paper is a preparation ritual. Once you've done it a few times, it takes only minutes. The reward is a perfectly flat, taut surface that can handle the heaviest, wettest washes you can throw at it.
Continue learning with the next step in this watercolor series.