Last updated September 16, 2026 — by César, editor at AestheticPoster
To flatten a rolled poster without damage: unroll it, counter-roll it 30 to 60 seconds in the opposite direction (2-3 times), then lay it flat under a board and books for 24 to 48 hours. No iron, no water, no hand tension: 250 g/m² paper with PVC coating relaxes on its own under weight—just wait.
Key takeaways
- Counter-rolling then dry press: rolling the poster backward relieves fiber tension, and weight from books completes the job in 24-48 hours.
- Three things to avoid: iron (melts the PVC coating), water or steam (wrinkles the paper, shifts ink), pulling at the edges (creases or cracks).
- Flatten before mounting: adhesive strips supplied with your poster stick better to a flat surface, and frames close without forcing.
Why the poster arrives rolled and holds its curve
Every AestheticPoster is shipped in a cardboard tube, printed on demand on matte 250 g/m² paper with PVC coating. Stiffer than standard 150-200 g/m² stock, it won't wrinkle in the tube but will retain its curve if left rolled for days. This isn't a defect—it's mechanical: the longer the tube stayed sealed, the sharper the crease. This same rigid paper relaxes on its own in 24 to 48 hours once laid flat.
Flattening a rolled poster in 4 steps
- Unroll it on a clean, dry surface, printed side up, in a room at stable temperature. Avoid the bathroom or any damp surface.
- Counter-roll it: pick up the poster and roll it loosely in the opposite direction of its curve. Hold it 30 to 60 seconds, unroll, repeat 2 to 3 times. This step is often skipped and saves the most time.
- Slide it between two sheets of clean paper (to prevent dust and smudges on the print), then place a rigid, smooth surface on top: thin board, cardboard sheet, or large flat-backed book.
- Weight it evenly with stacks of books spread across the entire surface, including the edges, and let sit for 24 hours without touching. If a curve remains, leave it another 24 hours.
| Age of the crease | Counter-rolls | Time under press |
|---|---|---|
| A few days (recent delivery) | 1 to 2 | 24 hours |
| A few weeks in the tube | 2 to 3 | 24-48 hours |
| Several months, tightly sealed | 3 to 5, over 2 days | 48-72 hours |
What not to do
The iron. Even on low heat, even through cloth: the PVC-coated paper reacts to warmth by melting or turning dull in patches. Irreversible—and the leading cause of posters damaged while flattening.
Water, steam, damp fabric. Moisture softens fibers briefly, then the paper wrinkles as it dries and ink can shift. A crease taking 24 extra hours to fade is fine; a wrinkled poster is not.
Hand tension. Pulling the edges, bending the poster backward to "break" the curve, or trapping it under a single heavy object: you'll get a sharp crease, a fracture, or a compression mark. Force doesn't replace time.
Realistic timeline
For a poster received within the week: 5 minutes of counter-rolling, one night under books, and it's flat by morning in most cases—count on 48 hours to be safe. A tube left sealed for months needs 2 to 3 days. Best practice: open the tube as soon as it arrives and counter-roll that same day, before the crease sets.
After flattening: mounting or framing
A flat poster is easier to hang. The adhesive strips supplied will stick along their full length instead of fighting an edge trying to re-roll: full method in how to mount a poster without drilling. For a frame, a still-curved poster stresses the back and can mark near the edges; see our guide to framing a poster and, for sizes M 30×42 cm, L 42×60 cm, and XL 60×84 cm, the comparison of compatible IKEA frames.
FAQ
Can you frame a poster that's still slightly curved?
Yes if the curve is mild: the frame backing and glass apply even pressure that finishes flattening it in a few days. If it's tightly rolled, press it 24 hours first or it may wrinkle in the frame.
Does 250 g/m² paper take longer to flatten than thinner stock?
Slightly longer because it's stiffer, but it handles much better: no accidental creases or bent corners. Under even weight, it regains flatness on its own in 24-48 hours.
The poster is still curved after 48 hours—what now?
Do 2 more counter-rolling cycles, then press it another 24 hours with more weight on the edges, where resistance is strongest. A crease months old may need 72 hours total. Extending the press always beats forcing.
All our posters ship in a tube with adhesive strips and are available framed: see the full collection.
César, editor at AestheticPoster—protocol refined from customer feedback, from light overnight creases to tubes sealed for six months.
