Guides
Part of Documented repair work versus invented case studies: where the real evidence lives
Keeping a photographic record of repairs that lasts
Building a repair archive that survives: what conditions photographs want, which enclosures are safe, and what to record alongside the images.
A repair archive is only useful if it is still readable in ten years. That is a storage problem as much as a photography one, and the conditions that preserve photographs are well documented because institutions have been losing them for a century.
What to take away
- Photographs want cool, dry and dark. Storage conditions matter more than the camera did.
- Enclosure material matters. Paper or plastic, buffered or unbuffered, are real choices with different consequences.
- Handle prints by the edges or with clean gloves, because skin oils damage emulsions.
- Keep the written record with the images, or the images become decoration.
What photographs actually want
The conditions are specific and mostly achievable at home. The National Park Service leaflet on caring for photographs gives general guidelines.
Storage and light conditions
- 20°Cmaximum storage temperature
- 20–40%relative humidity for photographs
- 20–30%relative humidity for film negatives
- 50–100 luxlight for display or research
Keep storage and work areas below 20 degrees C (68 degrees F) at 20 to 40 percent relative humidity; film-based negatives need 20 to 30 percent.
For most photographs, whether in use for research or on exhibit, keep light at 50 to 100 lux (5 to 10 footcandles). Store photographs in dark storage. Keep food, drink, dirt, cleaning chemicals, and photocopy machines away from photographic storage and work spaces.
Read across to a household archive and the instruction is: an interior cupboard, not a loft, not a garage, and not on a shelf above a radiator.
Enclosures are a real decision
The National Park Service leaflet on storage enclosures for photographic prints and negatives frames the choice: paper or plastic, buffered or non-buffered paper, polyester or other plastics, sleeves or envelopes. Each has advantages, disadvantages and precautions.
Choosing an archival enclosure
Does the enclosure meet ANSI IT9.2?
buy it as archival
avoid the cheapest sleeve
It says enclosures should meet the ANSI IT9.2 specification, which covers enclosure formats, papers, plastics and adhesives. It warns against handling prints and negatives with bare hands because oils and perspiration damage emulsions.
For most people this becomes one decision: buy enclosures sold as archival and meeting a stated standard, rather than the cheapest sleeve available.
If the archive is digital
Most repair archives now are. The same principles apply in different clothing:
- Keep files in a plain folder structure, not inside an app
- Use descriptive names that sortdate, garment, area
- Keep two copies in two places
- Export from any service before you stop paying for it
Digital storage fails suddenly rather than slowly, which makes the second copy the whole strategy. The failure is rarely a corrupted file; it is an account nobody renewed, a phone that was replaced, or a folder somebody tidied. None of those give warning, and all three are answered by a copy that lives somewhere you control.
Write it down beside the picture
Four lines per repair: garment and fiber, patch material, thread, date. Then a fifth after time has passed, saying what happened. A photograph with no note beside it records that something was done, which is the least useful part.
Write the note at the time, not later. Reconstructing which thread weight you used from a photograph is impossible, and the memory that feels reliable this week will be gone by the next repair.
The reasoning behind keeping any of this is set out in where documented repair work exists, and the lighting method for taking comparable frames is in photographing a repair that failed.
