Short answer: Yes, it slows fading substantially. UV-filtering framing acrylic blocks about 99% of ultraviolet light: Acrylite OP3 absorbs about 99.7% of UV from 200 to 390 nm, and Tru Vue Conservation Clear acrylic up to 99% from 300 to 380 nm, while still transmitting about 92% of visible light. It doesn't stop fading completely, because visible light and heat also fade pigments, so keep framed art out of direct sun.
Key facts
- Acrylite Gallery UV filtering (OP3): absorbs about 99.7% of UV from 200 to 390 nm; the absorber runs through the whole sheet, so either side can face the art.
- Tru Vue Conservation Clear acrylic: up to 99% of UV from 300 to 380 nm, 92% light transmission, made in 3, 4.5, and 6 mm.
- The framing benchmark: under Professional Picture Framers Association guidelines cited by Tru Vue, glazing must block at least 97% of UV from 300 to 380 nm to be called UV protective.
- Regular clear acrylic: blocks the shortest UV but passes a varying share of UV between roughly 345 and 395 nm; Plaskolite says standard Optix filters 80 to 90% of UV from 250 to 400 nm.
- Visible light: UV-filtering grades still pass about 92%, the same as regular clear.
What UV light does to art and photos
Ultraviolet light carries more energy than visible light, and it breaks down dyes, pigments, inks, and paper fibers. That's what turns a red poster pink, a signed jersey dull, and an old print yellow. Acrylite notes that UV is only about 3% of the sun's energy at ground level, but it's energetic enough to fade dyes and weather materials. UV is the most damaging part of the light that reaches your wall, but it isn't the only part: strong visible light and heat fade things too, just more slowly.
Sunlight through a window is the biggest source. Acrylite also lists fluorescent lamps among the artificial sources with significant UV. Most household LEDs give off very little, so a frame under LED lighting in a room without sun is already in a fairly gentle spot.
Doesn't regular acrylic already block UV?
Partly. Ordinary clear acrylic blocks most of the shortest, harshest UV, but lets through part of the longer UV just below the visible range. Acrylite's data show its colorless extruded sheet passes very little below 345 nm, a thickness-dependent share from 345 to 395 nm, and the full 92% above that; its cast sheet is UV absorbing up to about 360 nm. Plaskolite rates standard Optix at 80 to 90% UV filtering from 250 to 400 nm. That's well short of the 97% benchmark for conservation framing, so regular acrylic is not a substitute when protection is the point. For the broader picture, see does acrylic block UV.
What UV-filtering acrylic blocks
UV-filtering acrylic has a UV absorber added to the plastic. Visible light starts at about 400 nm, so the sheet still looks clear and colors look true.
| Regular clear acrylic | UV-filtering acrylic (OP3, Conservation Clear) | |
|---|---|---|
| Short UV (below about 340 nm) | Mostly blocked | Blocked |
| Long UV (about 345 to 395 nm) | Partly passed; varies by grade and thickness | About 99% blocked |
| Overall UV (Plaskolite, 250 to 400 nm) | 80 to 90% filtered (Optix) | 97 to 99%+ filtered |
| Visible light | 92% transmitted | 92% transmitted |
| Look | Clear | Clear |
Because the absorber in sheets such as OP3 is mixed through the whole thickness rather than coated on the surface, cutting, polishing the edges, or buffing out a light scratch doesn't reduce the protection. Coated products, such as anti-reflective museum acrylic, are different: follow the maker's cleaning rules so you don't damage the coating.
Does it stop fading completely?
No. It removes the most damaging part of the light, which slows fading a great deal, but bright visible light, heat, and humidity still take a toll over years. To make art last:
- Keep it out of direct sun, even behind UV-filtering acrylic.
- Avoid hanging it over heaters, fireplaces, or in hot attics.
- Use acid-free mats and backing so the frame itself doesn't yellow the art.
- Leave a gap between the acrylic and the art with a mat or spacers, so moisture can't condense on the surface.
When is UV-filtering acrylic worth it?
Use it for anything you'd be upset to see fade:
- Original art, watercolors, and drawings
- Signed memorabilia, jerseys, and autographs (signatures in marker fade quickly)
- Family photos and inkjet prints, which often use dye-based inks
- Documents, certificates, and textiles
- Display cases and shadow boxes near windows
Regular acrylic is fine for inexpensive posters you'll replace, kids' art in a hallway, and anything that lives in a room without sun.
UV-filtering acrylic for framing
For picture frames, UV-filtering acrylic gives you the UV protection of conservation glass at half the weight and without the shatter risk, which matters for big frames, shipping, and kids' rooms. Read acrylic vs glass for picture frames for the full comparison. If reflections are the bigger problem, compare non-glare acrylic; UV-filtering non-glare sheet (such as Acrylite OP3 P99) combines both for art placed flat against the sheet.
We stock UV-filtering clear in 1/8 in. for frames and 1/4 in. for larger frames and display cases, and we cut it to any size. Order frame fronts cut to size, or see your price instantly in the instant quote.
Tip: clean UV-filtering acrylic the same way as regular acrylic: a soft microfiber cloth with mild soap and water or an acrylic cleaner. Skip Windex-type glass sprays and full-strength alcohol, which can craze uncoated acrylic. How to clean acrylic.
Questions
How can I tell if acrylic is UV-filtering?
The protective film is usually printed with the product name (such as OP3 or UVF). Without the film, shine a 365 nm UV flashlight through the sheet onto something that fluoresces, such as a highlighter mark, and compare with no sheet: UV-filtering acrylic all but stops the glow, while regular acrylic usually lets some through. Flashlights sold as 395 nm are partly visible violet light, so they give a less clear result.
Is UV-filtering acrylic as good as museum glass?
For UV, yes: Tru Vue rates both Conservation Clear acrylic and Museum Glass at up to 99% from 300 to 380 nm. Museum glass adds an anti-reflective coating (under 1% reflection); the acrylic equivalent, Optium Museum Acrylic, has under 1.6% reflection and an anti-static surface.
Does UV-filtering acrylic yellow outdoors?
Acrylic of any kind is very resistant to yellowing in sunlight; Acrylite warrants its clear cast sheet to lose no more than 3% of its light transmission in 30 years. UV-filtering grades are made for protecting what's behind them, and they weather like regular acrylic. Does acrylic turn yellow?
Which side of UV-filtering acrylic faces the art?
For through-the-sheet products like Acrylite OP3, either side works. For coated versions, the coated side faces out: Acrylite marks the mar-resistant side of OP3-MR1 with blue tape and says it faces away from the artwork.
Is “93% UV protection” good enough for framing?
Not for conservation framing. The common framing benchmark is at least 97% of UV from 300 to 380 nm; conservation products such as OP3 and Conservation Clear are rated about 99%.