Printing and enlarging restored old photos
A restored photo needs roughly 200 to 300 pixels per printed inch to look sharp in the hand. A phone capture of a 6x4 print upscaled 4x gives you enough for A4 comfortably, and for A3 at arm's length. Print one small test before committing to the large version, because paper and screen do not agree about brightness.
How big can you actually print it
Work backwards from pixels. Divide the long edge of your file by 250 and you have a comfortable print size in inches. A 3000-pixel file prints nicely at 12 inches, which covers A4 with room to spare.
The old rule of 300 dpi comes from magazine printing, where readers hold the page close. A framed photograph on a wall is viewed from several feet away and holds up at 150 to 200 dpi, so do not let the number talk you out of an enlargement that will look fine where it actually hangs.
Where the upscale earns its place
This is the step that makes printing possible at all. A phone capture of a small print might give you 1200 pixels on the long edge, which is a postcard. Four times that is 4800, which is a poster.
The caveat is that the added pixels are reconstruction, not recovery. They hold up beautifully at viewing distance and reveal themselves under a magnifier, which is the right trade for something going in a frame and the wrong one for an archival copy.
Screens lie about brightness
Your phone emits light. Paper reflects it. A restoration that looked rich and contrasty on a bright screen frequently prints darker and flatter than you expected, and shadow detail that was visible on the display disappears into black ink.
The fix is a test print at 6x4, which costs very little and tells you exactly what the large one will look like. If the test comes back dark, lift the shadows slightly and print again. Two cheap tests beat one expensive mistake.
Paper choice matters more than people expect
Matte and lustre papers hide the small artefacts that AI reconstruction leaves behind, and they suit old photographs because the surface is closer to what prints of that era looked like. Gloss magnifies everything, both the detail you recovered and the places where the model guessed.
For anything going behind glass, matte also removes the reflection problem that makes framed photographs hard to view. If you are printing a colorized image, lustre tends to flatter it more than either extreme.
Where to get them printed
Chain pharmacy and supermarket photo counters handle standard sizes cheaply and are perfectly good for family copies. They print from a file you upload, so the restoration is done before you ever get there.
Dedicated photo labs cost more and are worth it for anything above A4, where paper quality and colour handling start to show. Ask for no auto-correction if the lab offers it, since automatic enhancement applied on top of your restoration usually fights it.
Print more than one
Prints of restored family photographs are the rare case where the second copy costs almost nothing and matters a great deal. A framed enlargement for the person who kept the album, a small one for whoever asked about it at Christmas.
Digital files quietly disappear across phone upgrades and dead hard drives. The paper copy sitting in someone's hallway is what actually survives, which is the same reason the originals you are restoring exist at all.
Questions people also ask
What size can I print a restored old photo at?
Divide the long edge in pixels by about 250 for a comfortable size in inches. A 4x upscale of a typical phone capture prints well at A4, and acceptably at A3 for wall viewing.
Should I print a restored photo on glossy or matte paper?
Matte or lustre for restored work. Gloss magnifies both the recovered detail and the reconstruction artefacts, and it reflects badly behind glass.
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