Photos Sticking to Scanner Glass: How to Avoid Newton's Rings on Glossy Prints

Glossy photos stick to scanner glass because their smooth gelatin surface makes near-perfect physical contact with the glass platen. This contact becomes significantly more problematic in humid rooms, specifically above 70% relative humidity, where the gelatin softens and becomes tacky. Wherever that contact is almost but not quite complete, a microscopic air gap between the photo surface and the glass creates interference patterns known as Newton's rings. The fix requires altering the scanning environment: keep the room humidity low, keep the scanner glass cool and clean, and lift the print off the glass by a hair using a thin card mask (on scanners with a very shallow focus range, check the preview stays sharp). For ultimate safety and quality, capture the image without contact on a cross-polarised overhead camera rig, which is exactly how our lab scans glossy prints.

Why glossy photos stick to scanner glass

Photographic prints consist of a paper or resin-coated base topped with an image-bearing layer of gelatin emulsion. Gelatin is highly sensitive to environmental moisture and temperature. Following guidance from the Image Permanence Institute and ISO 18920 storage standards, we know that gelatin emulsion becomes tacky and begins to stick, or block, to facing surfaces above 70% relative humidity. The risk of permanent adhesion rises sharply as humidity moves towards 80%.

When you place a glossy photograph face down on a flatbed scanner, you press two extremely smooth surfaces together. The weight of the scanner lid presses the air out, creating a seal. If you scan multiple photographs in a single session, the scanner lamp and electronics gradually warm the glass platen (older fluorescent-lamp models more than modern LED ones). That warmth transfers to the photograph, softening the gelatin further. Static electricity generated by wiping the scanner glass or sliding prints across the surface pulls the flexible paper even tighter against the platen. The result is a photograph firmly adhered to the scanner.

Is my print actually stuck, or just clinging?

Clinging is temporary. The photo lies entirely flat against the glass due to static and the vacuum created by the heavy lid, but the gelatin is still dry and hard. A clinging print drops away when you lift a corner. A stuck print is physically bonded to the glass. The gelatin has softened, acted as an adhesive, and dried or semi-dried onto the platen. Where it releases, the surface can be left with a shiny, glass-smooth patch — a defect known as ferrotyping. Removing a stuck print requires extreme care to prevent the emulsion tearing away from the paper backing.

What Newton's rings are (and why matte prints don't get them)

Newton's rings are rainbow-coloured concentric or blotchy fringes that appear across your scanned digital image. They are an optical interference phenomenon. They appear when two smooth surfaces, in this case a glossy print and a glass platen, almost touch. They leave a varying air gap only a fraction of a wavelength of light thick. When the scanner lamp illuminates the print, light reflects off the bottom surface of the glass and the top surface of the glossy print. Because the gap is so thin, these two reflected light waves interfere with one another. Where the peaks of the light waves align, the light amplifies. Where a peak meets a trough, the light cancels out. This creates the visible bands of alternating colour.

A smooth glossy gelatin surface naturally reflects about 4% of light straight back at normal incidence, due to Fresnel reflection and a refractive index of approximately 1.5. Matte surfaces scatter that light in all directions, whereas glossy surfaces send it straight back into the scanner's sensor. Because a matte print possesses a rough surface at a microscopic level, it never makes near-optical contact with the glass. The air gap remains too large and too irregular for interference patterns to form.

Symptom	What it looks like	Cause
Newton's rings	Rainbow-coloured concentric or blotchy fringes across the image	Interference from a microscopic air gap between smooth glass and glossy print
Glossy contact patches (ferrotyping)	Highly reflective, shiny, or differently textured irregular patches on the physical print	Gelatin softening and taking on the exact texture of the glass
Lamp hotspot	A bright, washed-out flare or glare covering a section of the digital image	Direct specular reflection of the scanner lamp off a glossy spot into the sensor
Moiré	A geometric, repeating grid or wavy pattern over the image	Scanning printed halftone material (like magazines), not photographs

In our 2026 EachMoment lab test, we analysed 120 loose consumer colour prints (60 glossy, 60 matte/silk), scanning them lid-down on a consumer flatbed. 33% of the glossy prints, 20 out of 60, showed a visible hotspot covering at least 5% of the image area. In contrast, only 3% of the matte and silk prints, just 2 out of 60, exhibited any issue. When we captured the exact same glossy set on our cross-polarised overhead camera rig, the hotspot area was 0%. The lesson is simple: the problem is not the scanner's resolution but the glossy surface meeting glass and a lamp at the wrong angle. Take the print off the glass and polarise the light, and the hotspot disappears.

How to avoid Newton's rings on glossy prints: 7 steps

1. Check room humidity. Keep your scanning environment well below 70% relative humidity. Let prints acclimatise to the dry room before scanning, and never scan in a steamy kitchen or bathroom.
2. Clean and dry the glass. Use a clean microfibre cloth to remove dust and oils. Always spray the cleaner onto the cloth, never directly onto the glass, to prevent liquid seeping under the platen edge.
3. Let the scanner cool between batches. Heat softens gelatin. Switch off the scanner and open the lid after every few batches to allow the lamp and glass to return to room temperature.
4. Create an air gap. Cut a thin card mask to place around the print edge, or use a dedicated holder or height adjuster if your scanner possesses one. This lifts the photo a fraction of a millimetre off the glass.
5. Don't press the lid hard. Lower the scanner lid gently and avoid stacking books on top of it. Heavy pressure forces the glossy surface into direct optical contact with the platen.
6. Scan at 600 dpi, 48-bit colour if offered. A typical 1980s–1990s glossy 6x4 machine print holds about 360 dpi of real detail (EachMoment bench measurement), so scanning at 600 dpi captures all of it. Going higher only makes bigger files without adding detail.
7. Inspect the preview at 100% before scanning the whole box. Zoom in on the first few scans to verify no rainbow fringes or bright hotspots are present before committing to digitising the entire collection.

What to do if a photo is already stuck to the glass

If you lift the scanner lid and the photo remains on the glass, do not pull it. Pulling forces the emulsion to separate from the paper base, permanently destroying the image. Switch off the scanner immediately and let the glass cool down completely. Lower the humidity in the room using a dehumidifier or air conditioning. Once the equipment is entirely cold, slide a thin, flat, clean plastic sheet beneath one corner very slowly. Gently work it under the print. Never use water, solvent or a blade on the emulsion, as these destroy the photograph instantly. If the print will not release, stop immediately and send it to a lab. Read our guide to detaching photos stuck to frame glass for more detail on handling adhered media.

Why our lab doesn't put glossy prints on the glass at all

At EachMoment, we bypass the physical limitations of flatbed scanners by capturing glossy prints on an overhead rig. We mount a full-frame DSLR and macro lens pointing downwards. We illuminate the print using cross-polarised studio lights. We place polarising film over the light sources and attach a crossed polarising filter to the camera lens. This optical configuration cancels almost all of the direct surface reflection from the glossy gelatin, eliminating glare, hotspots, and any possibility of Newton's rings. Nothing touches the print during this process. The rig captures one A4-sized area in about 4 seconds.

For specific items where glass contact does no harm, we run an Epson Perfection V850 Pro flatbed scanner. This machine delivers up to 6400 dpi optical resolution and 16-bit colour depth. We use this strictly for matte and textured prints, where the rough surface prevents optical interference and sticking. We apply this same contact-free logic to other media formats prone to interference. Learn more about how we handle Newton's rings on glass-mounted slides.

Home all-in-one or flatbed

Where the trouble starts

DIY

• Print pressed face-down on glass
• Glossy gelatin can cling to glass and show patchy contact marks
• Lamp reflection can leave a hotspot

Overhead camera rig

Contact-free capture of glossy prints

In the lab

• Full-frame DSLR with macro lens
• Print lies face-up, nothing pressing on it
• About 4 seconds per A4-sized capture

Cross-polarised lighting

Removes surface glare

In the lab

• Polarising film on the lights, crossed with a filter on the lens
• 0% hotspot area on our glossy test set
• Keeps true colour and shadow detail

Epson Perfection V850 Pro

Flatbed for matte and textured prints

In the lab

• Up to 6400 dpi optical
• 16-bit colour, ICC-profiled workflow
• Used where glass contact causes no harm

Memory Box

How prints reach the lab

Prepaid

• Pack your prints, post the box
• Tracked to our UK lab
• Files returned digitally, originals posted back

DIY flatbed or lab: which is right for your prints?

Scanning at home suits certain collections perfectly. If you have a few dozen matte prints, a DIY flatbed scanner is fine. The rough surface protects you from sticking and Newton's rings. However, if you possess boxes of glossy 1980s and 1990s prints, large albums, or anything already stuck or degraded, you require a lab. Flatbed scanning hundreds of glossy prints raises the odds of rings, hotspots and stuck prints across the batch when the platen heats up.

EachMoment serves tens of thousands of customers and has over one million items digitised, holding a Trustpilot rating of 4.7/5. Our service is priced from £0.39 per loose photo, falling to £0.23 at archive volumes. We send you a prepaid Memory Box to safely package your collection. We process everything in our UK facility. Explore our photo scanning service for loose items, learn about album scanning without removing prints, or read our detailed guide on scanning silk and lustre prints.

Frequently asked questions

Why do my photos stick to the scanner glass?

Your photos stick because the smooth gelatin emulsion forms a tight seal with the glass platen. Heat from the scanner lamp and room humidity above 70% soften the gelatin, turning it slightly tacky. The weight of the scanner lid and static electricity bind the surfaces together.

How do I get rid of Newton's rings when scanning photos?

You must break the optical contact between the glossy print and the glass. Use a thin cardboard mask to lift the print slightly off the platen. Alternatively, use a cross-polarised overhead camera rig to capture the image without any glass contact whatsoever.

Can I remove Newton's rings in editing software afterwards?

You can partly remove them using advanced retouching and clone stamping tools, but it is a slow, manual process. The concentric rainbow patterns damage underlying colour information. Prevention during scanning is far easier and yields a superior digital file.

Does anti-Newton glass work for prints?

Anti-Newton glass features a lightly textured surface that prevents optical contact, and it works excellently in film holders for negatives. However, home flatbed platens are made of plain, smooth glass. Replacing the entire scanner platen with anti-Newton glass is not practical.

Will a sticky print be damaged by the scanner?

The light from the scanner lamp is completely harmless to the photographic emulsion. However, peeling a sticky print off the glass risks severe physical damage. Fast removal causes emulsion lift, where the image rips off, or leaves permanent shiny ferrotyped patches.

What resolution should I scan glossy prints at?

You should scan glossy machine prints at 600 dpi. A typical 1980s or 1990s print holds approximately 360 dpi of real detail. Capturing at 600 dpi captures every available element. Higher resolutions only create larger files without revealing more information.