National and University Library of Slovenia (NUK) permanently stores and makes available to the public library material slovenica including newspapers. Old newspapers are available to users in the original format, copies on microfilm and in digital format on portal Digital Library of Slovenia. Article describes digitisation of printed newspapers, as well as the digitisation of copies on microfilm and workflow of digitisation in NUK and at the site of the outsourced contractor. There are specific procedures to select materials and its preparation for digitisation. Shown is an example of technical documentation as the parameters or instructions for contractor how to carry out the digitisation, implementation, and final quality control of digitised materials made by library experts. As the development of software and hardware in the 90 years of the 20th century increased, the digitisation of library materials has become involved also in the processes of protection of library materials. Digitisation of microfilm is also one way of preservation for microfilms from the extended usage and damaging environmental influences. Putting digital copies of newspapers and magazines online without any restrictions gives digitisation an additional value.