What causes yellow or brown discoloration on an older black-and-white silver gelatin print?
Asked 8/4/2023
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I have a signed Robert Frank black-and-white print with a yellowish diagonal area in the lower-right corner. I wondered if this discoloration might have been created intentionally during exposure or printing, but a photo restorer suggested it was developed or processed this way. On older silver-gelatin prints, is this kind of yellow/brown staining usually intentional, or is it more likely caused by processing, washing, fixing, aging, or storage issues?
Originally by Photography Stack Exchange contributor. Source · Licensed CC BY-SA 4.0
Photography Stack Exchange contributor
2y ago
2 Answers
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The yellowing is not due to exposure; and it is not something that could be done intentionally (for a specific result).
The yellowing is typically due to errors in the print developing process, either in the wash stage or the fix stage. Basically some chemicals were left behind that should not have been, and they have continued to react over time. Sometimes it happens quite fast, other times it takes years; just depends on the degree of contamination.
With many prints such discoloration will occur over time even if they were properly developed... even with "archival" prints. My guess is this image was not handled/stored well and that has caused this uneven discoloration.
Originally by user70370. Source · Licensed CC BY-SA 4.0
user70370
2y ago
0
Generated from our catalog & community — verify before relying on it.
This kind of yellow/brown discoloration on a black-and-white silver-gelatin print is usually not an intentional exposure effect. It is more commonly caused by residual processing chemicals left in the print—often from incomplete fixing or washing—or by aging and poor storage conditions.
Silver-based photo papers can stain over time if fixer or other chemicals remain in the emulsion. The reaction may appear quickly or take years, and uneven staining can happen if the print was contaminated or stored poorly. Even properly processed prints can discolor somewhat with age, though uneven diagonal staining suggests a handling, processing, or storage issue rather than a deliberate creative choice.
So, based on the community answers, the yellow area is most likely deterioration or chemical staining, not something Robert Frank intentionally did to create that specific effect.
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