FUGLSØ-mØderne - Nordisk Konservatorforbund Danmark

forhold udarbejdet. Indfarvede tekstiler blev
udsat for nedbrydning i vanddrukken jord
under kontrollerede forhold. Tekstilprøvesæt
er udgravet med specifikke intervaller
og undersøgt. Herunder er indflydelsen af
arkæologens/konservatorens gængse afrensningsmetoder
også kommet i fokus, idet
de viser sig at have stor betydning for både
muligheden for at spore de oprindelige
farvestoffer, samt for den fysiske bevaring af
tekstil og fibre.
Ulla Bøgvad Kejser
Konservatorskolen
Modelling the cost and quality of preservation
imaging and archiving
Cultural heritage institutions, such as
archives, libraries and museums, have a
tradition of copying their collections to enhance
access and support preservation. The
general aim of preservation driven copying
is to secure or protect valuable information
threatened by deterioration, handling, theft,
fire and other risks. In this PhD thesis it is
examined how one may evaluate the longterm
costs and benefits to cultural heritage
institutions of different preservation strategies
for preservation worthy digital images.
In order to obtain empirical data and to
understand the decisive cost factors in
preservation copying, a case study was set
up in which degrading sheet-film negatives
were digitised. Requirements for image
quality and metadata were investigated and
specifications based on best practice and
testing established. Also, the image quality
parameters, which influence the long term
preservation costs, were identified.
In co-operation with another project aiming
to cost preservation of digital materials held
by national cultural heritage institutions
in Denmark, a study was then undertaken
to provide a generic cost model for digital
preservation. The outcome of the study is an
activity based cost model, which accounts
for full economic costs. It is structured
around the functional descriptions in the
OAIS Reference Model. The cost model
divides the OAIS functions in a hierarchy
of cost critical activities and measurable
components, which are implemented as
formulas in a spreadsheet. So far the model
has only been completed for activities
relating to preservation planning and digital
migrations.
The work to design a cost model highlighted
the need for documenting underlying
assumptions and objectives of the model
and pointed to the need for a more systematic
evaluation of the quality of repositories
and the perceived benefits that different
preservation strategies may bring.
Overall the study has outlined a framework
for assessment of costs and benefits of
preservation strategies, which will hopefully
facilitate decision-making within cultural
heritage institutions and thus result in a
more efficient and appropriate consumption
of resources. •
40 års jubilæum
NKF-dk vil gerne sige tillykke til Maj
Stief med de 40 år på Nationalmuseet.
Samtidigt vil vi gerne takke hende for
hendes fortsatte store arbejde som
chefredaktør for Meddelelser om
Konservering.
24 BULLETIN