That’s a slightly difficult question to answer without seeing the actual photograph. Yellowing can occur for various reasons, and sometimes because of a combination of factors. Photographic materials and techniques also play a part. I can’t recommend that you try to clean the photograph yourself. There’s a lot of chemistry involved here, and you risk doing more harm than good. If you have a negative of the photograph, then of course you can get a new print made to put on display. In any event, I recommend that you have the photograph looked at by a photographic conservator. You can find a private conservator by going to the website of the Norwegian Section of the Nordic Association of Conservators (NKF) ( and clicking on ‘Find a conservator’.

Kind regards, Alexandra, paper conservator