|
C
|
|
Calcium carbonateAn alkaline chemical used as a buffer in paper and
boards.
CelluloseChemically, a complex carbohydrate. Cellulose is the chief
constituent of the cell walls of plants, and consequently the chief constituent
of many fibrous plant products such as paper and board, and cotton, linen
and rayon cloth. Traditional Western plants providing cellulose for paper
were cotton and linen ('rag' paper). Wood is the major source of papermaking
fibres today. The quality of wood pulp papers can vary from very high
to very low, depending both on the methods of extraction of the cellulose
fibres and manufacturing methods.
Chemical stability Not easily decomposed or otherwise modified chemically.
This is a desirable characteristic for materials used in preservation,
since it suggests an ability to resist chemical degradation, such as
paper embrittlement, over time and/or exposure to varying conditions
during use or storage. Sometimes described as chemically inert.
Coated paper Paper with a surface coating (adhesives, clay or other pigments
etc) that is added to improve its finish in terms of printability, smoothness
or opacity. Coated papers usually have a glossy appearance and are sometimes
called 'art papers’. Older clay coated papers have a tendency to
block when they are exposed to high relative humidity or become wet.
Conservation The use of procedures to preserve and repair the physical
structure of an item. All processes ideally should be reversible.
Conservator A person professionally responsible for the physical preservation
of collection items in order to retain and maintain their evidential
or informational content.
|
|