How to Clean Old Photos Before Scanning

The photograph arrived in an envelope with two decades of dust on it. That's not unusual — many family photographs have been in storage conditions that accumulated surface contamination over years or decades. Before scanning, some cleaning is often beneficial.

But "cleaning" is a word that requires careful definition when it comes to photographs. The wrong cleaning technique can cause more damage than the original contamination.

What You Can Safely Remove

Loose dust and particles are safely removed with a soft, clean brush (a broad watercolor brush or a photographic air blower). Work gently, under raking light so you can see what you're removing.

Fingerprints on the surface may be addressable with a clean, dry cotton cloth, very gently applied. Don't rub — dab lightly. Test on an edge first. Some fingerprints have become chemically bonded to the emulsion over time and cannot be removed without damage.

Loose surface contamination that hasn't bonded to the emulsion can sometimes be removed with a cotton swab barely moistened with distilled water. Emphasize "barely" — liquid on photographic emulsion is a significant risk.

What You Cannot Safely Do

Do not use cleaning sprays or solvents. Even isopropyl alcohol, often recommended for other surfaces, can damage photographic emulsion and dissolve color dyes.

Do not rub vigourously. The emulsion surface of an old photograph is fragile. Rubbing with any material can scratch the surface or remove emulsion.

Do not apply liquids to color photographs. Color dyes in photographic prints are much more water-soluble than black-and-white silver images. Even small amounts of water can cause dye migration and blotching.

Do not try to remove mold physically. Mold that has grown into the emulsion has become part of the photograph. Physical removal tears out emulsion. Scan the mold-damaged photograph; AI inpainting handles mold patterns reasonably well.

When to Stop and Scan

If a photograph has contamination that you're uncertain how to address, the answer is: scan first, treat later (or don't treat). A scan captures the current state of the photograph before any additional intervention. If cleaning goes wrong, you have the scan to fall back on.

For truly valuable photographs, professional conservation cleaning is worth the cost. Professional conservators have access to techniques and materials that safely address contamination that would be risky to address at home.

After cleaning, scan at 600 DPI minimum. Then take the scan to our photo restoration tool to address what cleaning couldn't remove.