The Influence of Scanning on the Preservation of Black-and-White Photo-Documents
At present, scanning is widely employed in archives and museums for copying of documents. The problem of its effect on photos is rather complicated and heterogeneous, as photos, in particular, of the 19 <sup>th</sup> century are of different producing techniques. These are various emulsion layers, and aluminous, gelatinous producing processes. The materials of the photos’ origin are deteriorating in time under the effect of many factors; the most detrimental of wh^h is light.