Photography and graphic arts

A print or a photograph may exist in several copies, all "originals", provided they were pulled under the artist's supervision. Value then depends on the number of copies, the date of printing, the quality of the print, the signature and the numbering.

A vintage print, made in the artist's lifetime or soon after the exposure, is generally worth much more than a later print made after their death. The distinctions are subtle and call for an expert eye.

For many deceased artists, rights holders authorise posthumous prints, often numbered. They are valid on the market if clearly identified as such, but are worth less than vintage prints.

OIMAP issues a certificate that states the nature of the print (vintage, later, posthumous), the edition number, the date and the process used. This certificate has become an expected document for sales above €5,000.

Works on paper are sensitive to light, humidity, pollutants and handling. A photograph on permanent display may yellow or fade within a few years. A badly mounted print may warp or stain.

OIMAP conservation reports indicate the paper, the technique, any alterations and exhibition recommendations. They are particularly useful for insurers and lenders.