Updated August 25, 2026 — by César, Editor at AestheticPoster
To clean a framed poster safely: Dust the frame with a dry microfiber cloth, then clean the glass or acrylic with a slightly dampened cloth and water only (never spray directly on the glass). The paper itself should never be cleaned with water or products — if it's not protected by a pane of glass, only very careful dry dusting is possible.
Key takeaways
- Glass or acrylic on a frame is cleaned only with water and a microfiber cloth — never with household sprays sprayed directly, which can seep under the frame and stain the paper.
- Acrylic scratches much more easily than mineral glass: a clean microfiber cloth is essential, never paper towels or abrasive sponges.
- A poster with no glass protection (displayed directly on the wall, unframed) must never be cleaned with water: only a soft brush or a completely dry microfiber cloth is safe for light dusting.
- A matte finish on a poster shows fingerprints and scratches more visibly than a glossy finish — another reason to never touch the paper directly.
- Light dusting of the frame every 2–3 months is plenty in a normal home; more frequent cleaning is unnecessary as each handling risks scratching the glass.
How to clean glass or acrylic on a frame without scratching
The basic rule is the same as for a phone or computer screen: never spray products directly on the surface. Spray water (or a mild glass cleaner without ammonia) on the cloth, never on the frame — excess liquid running down the edges can seep between the glass and poster, leaving an irreversible stain on 250 g/m² paper.
- Step 1: Dust dry with a clean microfiber cloth in one direction, without pressing.
- Step 2: Lightly dampen a second microfiber cloth (or chamois leather) with lukewarm water and wring it almost dry.
- Step 3: Wipe in gentle circular motions, never pressing on the edges where glass meets the frame.
- Step 4: Dry immediately with a clean, dry cloth to prevent any limescale marks.
For acrylic (often used on large formats like A1, 594×841 mm, for its reduced weight), the same protocol applies but with even more care: acrylic scratches at the slightest speck of dust rubbed too hard, unlike mineral glass. A microfiber cloth dedicated to plastic surfaces, never one used elsewhere, significantly reduces this risk.
Which products are forbidden on a poster frame?
Some everyday products, otherwise common for cleaning regular window panes, permanently damage a poster frame or the paper it protects.
| Product or item | Why to avoid it | Alternative |
|---|---|---|
| Ammonia-based glass cleaner sprays | Can yellow the frame finish and damage anti-reflective coatings | Lukewarm water alone or mild glass cleaner without ammonia |
| Paper towels or tissues | Abrasive fibers that micro-scratch glass, especially acrylic | Clean, dedicated microfiber cloth |
| Sponge, even soft side | Too abrasive for acrylic, leaves visible micro-scratches when backlit | Damp microfiber cloth |
| Rubbing alcohol or concentrated cleaner | Can dissolve surface treatments (UV-protection, anti-glare) | Lukewarm water, possibly one drop of diluted mild soap |
| Spraying directly on the frame | Excess liquid seeps between glass and paper, causing irreversible staining | Always spray on the cloth first, never on the frame |
This protocol aligns with general recommendations from the ADEME on concentrated household cleaners, which should be limited and never used undiluted on sensitive surfaces.
Can you clean an unframed poster displayed directly on the wall?
No, not with water or products — the paper is unprotected and absorbs any liquid, which warps the fibers and can fade the ink. For a poster with no glass protection (hung with washi tape, removable adhesive, or batten strips), the only safe operation is very light dusting: a soft makeup brush, or a completely dry microfiber cloth laid flat, never rubbed. This is also why framing under glass remains the best long-term protection, as detailed in our guide on protecting a poster from the sun: UV and fading.
Does matte or glossy finish change the cleaning?
Yes, somewhat — especially if the poster isn't under glass. A matte finish shows fingerprints and rubs more visibly than glossy, whose smoother surface resists minor contact better. This isn't a reason to handle a glossy poster carelessly: in both cases, the best protection remains physical — a frame under glass or acrylic — rather than a cleaning gesture. The full comparison of both finishes is in our guide to matte or glossy posters.
How often should you clean a poster frame?
Light dusting every 2–3 months is plenty in a normal home without a fireplace or high dust exposure. In a kitchen (with grease vapor) or frequently used room, light monthly dusting prevents buildup of a film that becomes harder to remove without rubbing. The key habit is minimal frequency: every cleaning is a frame manipulation, thus a scratch risk — better to dust often and gently than rarely and firmly.
FAQ — Cleaning and maintaining a framed poster
Can you use standard glass cleaner on a poster frame?
Only if ammonia-free and sprayed on the cloth, never directly on the frame. Ammonia can attack the frame finish and some anti-reflective or UV-protective coatings. When in doubt, lukewarm water alone remains the safest choice.
How do you remove a fingerprint from an unframed poster?
There is no risk-free method once the paper has been touched with greasy fingers — which is why prevention is key: handle unframed posters only by the edges, or opt for framing under glass, which eliminates this risk permanently.
Does acrylic scratch more easily than glass?
Yes, much more easily. Acrylic is a plastic, softer than mineral glass: a speck of dust rubbed with a rough cloth is enough to create a micro-scratch visible in backlight. A clean, dedicated microfiber cloth greatly reduces this risk.
Should you remove the poster from the frame to clean it?
No, never for simple glass cleaning — removing it multiplies handling and thus risks (creases, fingerprints, dust settling between glass and paper). Clean only the outer surface of the glass, frame closed.
Go further
To choose the right format before framing, our resource page on choosing a poster format: A3, A2, or A1 is the best starting point. If your poster has a slight curl after unrolling before framing, our guide on flattening a rolled poster in 4 steps details the safe method. Explore all our formats and finishes in our complete poster catalog.
César, Editor at AestheticPoster — the reflex that saves most posters: never spray directly on a frame, always on the cloth first.
